April 2021 Holidays & Observances Worldwide
There is a total of 835 public holidays and observances in April of 2021 for over 230 countries and 3300 locations around the world. In the table below, you will find the details of the holidays & observances along with when and where they are observed.
All the information displayed below is also available via our API as well as downloadable as a csv. Signup here to get started.
These dates may be modified as official changes are announced, so please check back regularly for updates or sign up for our newsletter to receive regular updates. All updates are automatically added to our API as well.
Our API allows you to specify the State and Region as part of the API requests, thereby limiting the requests to a particular state or city. View the API documentation for a full description of the supported countries, states, and regions.
| Date | Holiday | Location |
|---|---|---|
| Thursday, April 1, 2021 | Maundy Thursday (Starting Noon) | Andorra |
| Thursday, April 1, 2021 | Maundy Thursday | Argentina |
| Thursday, April 1, 2021 | Maundy Thursday | Australia |
| Thursday, April 1, 2021 | Maundy Thursday | Bangladesh |
| Thursday, April 1, 2021 | Maundy Thursday | Bolivia |
| Thursday, April 1, 2021 | Maundy Thursday | Canada |
| Thursday, April 1, 2021 | Maundy Thursday | Chile |
| Thursday, April 1, 2021 | Maundy Thursday | Colombia |
| Thursday, April 1, 2021 | Maundy Thursday | Costa Rica |
| Thursday, April 1, 2021 | Maundy Thursday | Cuba |
| Thursday, April 1, 2021 | Holy Thursday | Cabo Verde |
| Thursday, April 1, 2021 | Cyprus National Holiday | Cyprus |
| Thursday, April 1, 2021 | Maundy Thursday | Czechia |
| Thursday, April 1, 2021 | Maundy Thursday | Germany |
| Thursday, April 1, 2021 | Maundy Thursday | Germany |
| Thursday, April 1, 2021 | Maundy Thursday | Denmark |
| Thursday, April 1, 2021 | Maundy Thursday | Dominican Republic |
| Thursday, April 1, 2021 | Maundy Thursday | Ecuador |
| Thursday, April 1, 2021 | Maundy Thursday | Spain |
| Thursday, April 1, 2021 | Maundy Thursday | Spain |
| Thursday, April 1, 2021 | Maundy Thursday | Faroe Islands |
| Thursday, April 1, 2021 | Maundy Thursday | Greenland |
| Thursday, April 1, 2021 | Maundy Thursday | Equatorial Guinea |
| Thursday, April 1, 2021 | Maundy Thursday | Guatemala |
| Thursday, April 1, 2021 | Maundy Thursday | Honduras |
| Thursday, April 1, 2021 | Maundy Thursday | Ireland |
| Thursday, April 1, 2021 | Passover (Day 5) | Israel |
| Thursday, April 1, 2021 | Catholic/Protestant Maundy Thursday | Israel |
| Thursday, April 1, 2021 | Maundy Thursday | India |
| Thursday, April 1, 2021 | Islamic Republic Day | Iran |
| Thursday, April 1, 2021 | Maundy Thursday | Iceland |
| Thursday, April 1, 2021 | Maundy Thursday | Mexico |
| Thursday, April 1, 2021 | Maundy Thursday | Norfolk Island |
| Thursday, April 1, 2021 | Maundy Thursday | Nicaragua |
| Thursday, April 1, 2021 | Maundy Thursday | Norway |
| Thursday, April 1, 2021 | April Fools | New Zealand |
| Thursday, April 1, 2021 | Maundy Thursday | Panama |
| Thursday, April 1, 2021 | Maundy Thursday | Peru |
| Thursday, April 1, 2021 | Maundy Thursday | Philippines |
| Thursday, April 1, 2021 | Maundy Thursday | Paraguay |
| Thursday, April 1, 2021 | April Fool's Day | Singapore |
| Thursday, April 1, 2021 | Investiture Ceremony of the Captains Regent 1 | San Marino |
| Thursday, April 1, 2021 | Maundy Thursday | El Salvador |
| Thursday, April 1, 2021 | April Fools | Ukraine |
| Thursday, April 1, 2021 | Maundy Thursday | United Kingdom |
| Thursday, April 1, 2021 | Maundy Thursday | United States |
| Thursday, April 1, 2021 | April Fool's Day | United States |
| Thursday, April 1, 2021 | Maundy Thursday | Uruguay |
| Thursday, April 1, 2021 | Maundy Thursday | Venezuela |
| Thursday, April 1, 2021 | April Fool's Day | US Virgin Islands |
| Thursday, April 1, 2021 | Holy Thursday | US Virgin Islands |
| Friday, April 2, 2021 | Good Friday | Andorra |
| Friday, April 2, 2021 | Good Friday | Antigua and Barbuda |
| Friday, April 2, 2021 | Good Friday | Anguilla |
| Friday, April 2, 2021 | Good Friday | Albania |
| Friday, April 2, 2021 | Good Friday | Armenia |
| Friday, April 2, 2021 | Good Friday | Angola |
| Friday, April 2, 2021 | Good Friday | Argentina |
| Friday, April 2, 2021 | Day of the Veterans | Argentina |
| Friday, April 2, 2021 | Sixth Day of Passover | Argentina |
| Friday, April 2, 2021 | Good Friday | American Samoa |
| Friday, April 2, 2021 | Good Friday | Austria |
| Friday, April 2, 2021 | Good Friday | Australia |
| Friday, April 2, 2021 | Good Friday | Australia |
| Friday, April 2, 2021 | Good Friday | Aruba |
| Friday, April 2, 2021 | Good Friday | Bosnia and Herzegovina |
| Friday, April 2, 2021 | Good Friday | Barbados |
| Friday, April 2, 2021 | Good Friday | Bangladesh |
| Friday, April 2, 2021 | Good Friday | Belgium |
| Friday, April 2, 2021 | Good Friday | St. Barts |
| Friday, April 2, 2021 | Good Friday | Bermuda |
| Friday, April 2, 2021 | Good Friday | Bolivia |
| Friday, April 2, 2021 | Good Friday | Brazil |
| Friday, April 2, 2021 | Good Friday | The Bahamas |
| Friday, April 2, 2021 | Good Friday | Botswana |
| Friday, April 2, 2021 | Union Day of Belarus and Russia | Belarus |
| Friday, April 2, 2021 | Good Friday | Belize |
| Friday, April 2, 2021 | Good Friday | Canada |
| Friday, April 2, 2021 | Good Friday | Canada |
| Friday, April 2, 2021 | Good Friday | Switzerland |
| Friday, April 2, 2021 | Good Friday | Cook Islands |
| Friday, April 2, 2021 | Good Friday | Chile |
| Friday, April 2, 2021 | Good Friday | Cameroon |
| Friday, April 2, 2021 | Good Friday | Colombia |
| Friday, April 2, 2021 | Good Friday | Costa Rica |
| Friday, April 2, 2021 | Good Friday | Cuba |
| Friday, April 2, 2021 | Good Friday | Cabo Verde |
| Friday, April 2, 2021 | Good Friday | Curaçao |
| Friday, April 2, 2021 | Good Friday | Czechia |
| Friday, April 2, 2021 | Good Friday | Germany |
| Friday, April 2, 2021 | Sixth Day of Passover | Germany |
| Friday, April 2, 2021 | Good Friday | Denmark |
| Friday, April 2, 2021 | Good Friday | Dominica |
| Friday, April 2, 2021 | Good Friday | Dominican Republic |
| Friday, April 2, 2021 | Good Friday | Ecuador |
| Friday, April 2, 2021 | Good Friday | Estonia |
| Friday, April 2, 2021 | Good Friday | Spain |
| Friday, April 2, 2021 | Good Friday | Finland |
| Friday, April 2, 2021 | Good Friday | Fiji |
| Friday, April 2, 2021 | Good Friday | Falkland Islands |
| Friday, April 2, 2021 | Good Friday | Micronesia |
| Friday, April 2, 2021 | Good Friday | Faroe Islands |
| Friday, April 2, 2021 | Good Friday | France |
| Friday, April 2, 2021 | Good Friday | Grenada |
| Friday, April 2, 2021 | Good Friday | French Guiana |
| Friday, April 2, 2021 | Good Friday | Guernsey |
| Friday, April 2, 2021 | Good Friday | Ghana |
| Friday, April 2, 2021 | Good Friday | Gibraltar |
| Friday, April 2, 2021 | Good Friday | Greenland |
| Friday, April 2, 2021 | Good Friday | Gambia |
| Friday, April 2, 2021 | Good Friday | Equatorial Guinea |
| Friday, April 2, 2021 | Good Friday | Guatemala |
| Friday, April 2, 2021 | Good Friday | Guyana |
| Friday, April 2, 2021 | Good Friday | Hong Kong |
| Friday, April 2, 2021 | Good Friday | Honduras |
| Friday, April 2, 2021 | Good Friday | Haiti |
| Friday, April 2, 2021 | Good Friday | Hungary |
| Friday, April 2, 2021 | Good Friday | Indonesia |
| Friday, April 2, 2021 | Good Friday | Ireland |
| Friday, April 2, 2021 | Passover (Day 6) | Israel |
| Friday, April 2, 2021 | Catholic/Protestant Good Friday | Israel |
| Friday, April 2, 2021 | Good Friday | Isle of Man |
| Friday, April 2, 2021 | Good Friday | India |
| Friday, April 2, 2021 | Nature Day | Iran |
| Friday, April 2, 2021 | Good Friday | Iceland |
| Friday, April 2, 2021 | Good Friday | Italy |
| Friday, April 2, 2021 | Good Friday | Jersey |
| Friday, April 2, 2021 | Good Friday | Jamaica |
| Friday, April 2, 2021 | Good Friday | Jordan |
| Friday, April 2, 2021 | Good Friday | Kenya |
| Friday, April 2, 2021 | Good Friday | Kiribati |
| Friday, April 2, 2021 | Good Friday | Saint Kitts and Nevis |
| Friday, April 2, 2021 | Good Friday | Cayman Islands |
| Friday, April 2, 2021 | Good Friday | Lebanon |
| Friday, April 2, 2021 | Good Friday | Saint Lucia |
| Friday, April 2, 2021 | Good Friday | Liechtenstein |
| Friday, April 2, 2021 | Good Friday | Sri Lanka |
| Friday, April 2, 2021 | Good Friday | Lesotho |
| Friday, April 2, 2021 | Good Friday | Lithuania |
| Friday, April 2, 2021 | Good Friday | Luxembourg |
| Friday, April 2, 2021 | Good Friday | Latvia |
| Friday, April 2, 2021 | Good Friday | Monaco |
| Friday, April 2, 2021 | Good Friday | Montenegro |
| Friday, April 2, 2021 | Good Friday | Saint Martin |
| Friday, April 2, 2021 | Good Friday | Marshall Islands |
| Friday, April 2, 2021 | Good Friday | North Macedonia |
| Friday, April 2, 2021 | Good Friday | Macau |
| Friday, April 2, 2021 | Good Friday | Northern Mariana Islands |
| Friday, April 2, 2021 | Good Friday | Martinique |
| Friday, April 2, 2021 | Good Friday | Montserrat |
| Friday, April 2, 2021 | Good Friday | Malta |
| Friday, April 2, 2021 | Good Friday | Malawi |
| Friday, April 2, 2021 | Good Friday | Mexico |
| Friday, April 2, 2021 | Good Friday | Malaysia |
| Friday, April 2, 2021 | Good Friday | Mozambique |
| Friday, April 2, 2021 | Good Friday | Namibia |
| Friday, April 2, 2021 | Good Friday | New Caledonia |
| Friday, April 2, 2021 | Good Friday | Norfolk Island |
| Friday, April 2, 2021 | Good Friday | Nigeria |
| Friday, April 2, 2021 | Good Friday | Nicaragua |
| Friday, April 2, 2021 | Good Friday | Netherlands |
| Friday, April 2, 2021 | Good Friday | Norway |
| Friday, April 2, 2021 | Good Friday | Nauru |
| Friday, April 2, 2021 | Good Friday | New Zealand |
| Friday, April 2, 2021 | Good Friday | Panama |
| Friday, April 2, 2021 | Good Friday | Peru |
| Friday, April 2, 2021 | Good Friday | French Polynesia |
| Friday, April 2, 2021 | Good Friday | Papua New Guinea |
| Friday, April 2, 2021 | Good Friday | Philippines |
| Friday, April 2, 2021 | Good Friday | Pakistan |
| Friday, April 2, 2021 | Good Friday | Poland |
| Friday, April 2, 2021 | Good Friday | Puerto Rico |
| Friday, April 2, 2021 | Good Friday | Portugal |
| Friday, April 2, 2021 | Good Friday | Paraguay |
| Friday, April 2, 2021 | Western Good Friday | Serbia |
| Friday, April 2, 2021 | Good Friday | Rwanda |
| Friday, April 2, 2021 | Good Friday | Solomon Islands |
| Friday, April 2, 2021 | Good Friday | Seychelles |
| Friday, April 2, 2021 | Good Friday | Sweden |
| Friday, April 2, 2021 | Good Friday | Singapore |
| Friday, April 2, 2021 | Good Friday | Saint Helena |
| Friday, April 2, 2021 | Good Friday | Slovakia |
| Friday, April 2, 2021 | Good Friday | Sierra Leone |
| Friday, April 2, 2021 | Good Friday | San Marino |
| Friday, April 2, 2021 | Good Friday | Suriname |
| Friday, April 2, 2021 | Good Friday | South Sudan |
| Friday, April 2, 2021 | Good Friday | El Salvador |
| Friday, April 2, 2021 | Good Friday | Sint Maarten |
| Friday, April 2, 2021 | Good Friday | Eswatini |
| Friday, April 2, 2021 | Good Friday | Turks and Caicos Islands |
| Friday, April 2, 2021 | Good Friday | East Timor |
| Friday, April 2, 2021 | Good Friday | Tonga |
| Friday, April 2, 2021 | Good Friday | Trinidad and Tobago |
| Friday, April 2, 2021 | Good Friday | Tuvalu |
| Friday, April 2, 2021 | Children's Day Holiday | Taiwan |
| Friday, April 2, 2021 | Good Friday | Tanzania |
| Friday, April 2, 2021 | Good Friday | Uganda |
| Friday, April 2, 2021 | Good Friday | United Kingdom |
| Friday, April 2, 2021 | World Autism Awareness Day | United States |
| Friday, April 2, 2021 | Good Friday | United States |
| Friday, April 2, 2021 | Pascua Florida Day | United States |
| Friday, April 2, 2021 | State Holiday | United States |
| Friday, April 2, 2021 | Good Friday | Uruguay |
| Friday, April 2, 2021 | Good Friday | Vatican City (Holy See) |
| Friday, April 2, 2021 | Good Friday | Saint Vincent and the Grenadines |
| Friday, April 2, 2021 | Good Friday | Venezuela |
| Friday, April 2, 2021 | Good Friday | British Virgin Islands |
| Friday, April 2, 2021 | Good Friday | US Virgin Islands |
| Friday, April 2, 2021 | Good Friday | Vanuatu |
| Friday, April 2, 2021 | Good Friday | Samoa |
| Friday, April 2, 2021 | Good Friday | South Africa |
| Friday, April 2, 2021 | Good Friday | Zambia |
| Friday, April 2, 2021 | Good Friday | Zimbabwe |
| Saturday, April 3, 2021 | Holy Saturday | Andorra |
| Saturday, April 3, 2021 | Holy Saturday | Albania |
| Saturday, April 3, 2021 | Holy Saturday | Armenia |
| Saturday, April 3, 2021 | Seventh Day of Passover | Argentina |
| Saturday, April 3, 2021 | Holy Saturday | Australia |
| Saturday, April 3, 2021 | Holy Saturday | Bosnia and Herzegovina |
| Saturday, April 3, 2021 | Holy Saturday | Bangladesh |
| Saturday, April 3, 2021 | Holy Saturday | Botswana |
| Saturday, April 3, 2021 | Holy Saturday | Belize |
| Saturday, April 3, 2021 | Holy Saturday | Canada |
| Saturday, April 3, 2021 | Holy Saturday | Chile |
| Saturday, April 3, 2021 | Qing Ming Jie Holiday | China |
| Saturday, April 3, 2021 | Holy Saturday | Czechia |
| Saturday, April 3, 2021 | Holy Saturday | Germany |
| Saturday, April 3, 2021 | Seventh Day of Passover | Germany |
| Saturday, April 3, 2021 | Holy Saturday | Ecuador |
| Saturday, April 3, 2021 | Holy Saturday | Spain |
| Saturday, April 3, 2021 | Holy Saturday | Fiji |
| Saturday, April 3, 2021 | Holy Saturday | Ghana |
| Saturday, April 3, 2021 | Second Republic Day | Guinea |
| Saturday, April 3, 2021 | Easter Saturday | Guatemala |
| Saturday, April 3, 2021 | Holy Saturday | Hong Kong |
| Saturday, April 3, 2021 | Holy Saturday | Honduras |
| Saturday, April 3, 2021 | Holy Saturday | Ireland |
| Saturday, April 3, 2021 | Passover (Day 7) | Israel |
| Saturday, April 3, 2021 | Catholic/Protestant Holy Saturday | Israel |
| Saturday, April 3, 2021 | Holy Saturday | Iceland |
| Saturday, April 3, 2021 | Holy Saturday | Lithuania |
| Saturday, April 3, 2021 | Holy Saturday | Latvia |
| Saturday, April 3, 2021 | Holy Saturday | Monaco |
| Saturday, April 3, 2021 | Easter Saturday | North Macedonia |
| Saturday, April 3, 2021 | Holy Saturday | Macau |
| Saturday, April 3, 2021 | Easter Saturday | Malawi |
| Saturday, April 3, 2021 | Holy Saturday | Mexico |
| Saturday, April 3, 2021 | Holy Saturday | Nigeria |
| Saturday, April 3, 2021 | Holy Saturday | Nicaragua |
| Saturday, April 3, 2021 | Holy Saturday | Norway |
| Saturday, April 3, 2021 | Holy Saturday | New Zealand |
| Saturday, April 3, 2021 | Holy Saturday | Panama |
| Saturday, April 3, 2021 | Holy Saturday | Papua New Guinea |
| Saturday, April 3, 2021 | Black Saturday | Philippines |
| Saturday, April 3, 2021 | Black Saturday | Philippines |
| Saturday, April 3, 2021 | Holy Saturday | Poland |
| Saturday, April 3, 2021 | Western Easter Saturday | Serbia |
| Saturday, April 3, 2021 | Holy Saturday | Solomon Islands |
| Saturday, April 3, 2021 | Holy Saturday | Seychelles |
| Saturday, April 3, 2021 | Holy Saturday | Sweden |
| Saturday, April 3, 2021 | Easter Saturday | Singapore |
| Saturday, April 3, 2021 | Holy Saturday | San Marino |
| Saturday, April 3, 2021 | Holy Saturday | South Sudan |
| Saturday, April 3, 2021 | Holy Saturday | El Salvador |
| Saturday, April 3, 2021 | Holy Saturday | Tuvalu |
| Saturday, April 3, 2021 | Holy Saturday | United Kingdom |
| Saturday, April 3, 2021 | Holy Saturday | United States |
| Saturday, April 3, 2021 | Holy Saturday | Vatican City (Holy See) |
| Saturday, April 3, 2021 | Day After Good Friday | Samoa |
| Saturday, April 3, 2021 | Holy Saturday | South Africa |
| Saturday, April 3, 2021 | Holy Saturday | Zambia |
| Saturday, April 3, 2021 | Holy Saturday | Zimbabwe |
| Sunday, April 4, 2021 | Easter Sunday | Andorra |
| Sunday, April 4, 2021 | Easter Sunday | Albania |
| Sunday, April 4, 2021 | Easter Sunday | Armenia |
| Sunday, April 4, 2021 | Peace Day | Angola |
| Sunday, April 4, 2021 | Easter Sunday | Argentina |
| Sunday, April 4, 2021 | Last day of Passover | Argentina |
| Sunday, April 4, 2021 | Easter Sunday | Austria |
| Sunday, April 4, 2021 | Daylight Saving Time ends | Australia |
| Sunday, April 4, 2021 | Last day of Passover | Australia |
| Sunday, April 4, 2021 | Easter Sunday | Australia |
| Sunday, April 4, 2021 | Easter Sunday | Australia |
| Sunday, April 4, 2021 | Easter Sunday | Australia |
| Sunday, April 4, 2021 | Easter Sunday | Australia |
| Sunday, April 4, 2021 | Easter Sunday | Australia |
| Sunday, April 4, 2021 | Easter Sunday | Bosnia and Herzegovina |
| Sunday, April 4, 2021 | Easter Sunday | Barbados |
| Sunday, April 4, 2021 | Easter Day | Bangladesh |
| Sunday, April 4, 2021 | Easter Sunday | Belgium |
| Sunday, April 4, 2021 | Easter Sunday | St. Barts |
| Sunday, April 4, 2021 | Easter Sunday | Bermuda |
| Sunday, April 4, 2021 | Easter Sunday | Brazil |
| Sunday, April 4, 2021 | Easter Sunday | The Bahamas |
| Sunday, April 4, 2021 | Catholic Easter Sunday | Belarus |
| Sunday, April 4, 2021 | Easter Sunday | Belize |
| Sunday, April 4, 2021 | Last day of Passover | Canada |
| Sunday, April 4, 2021 | Easter Sunday | Canada |
| Sunday, April 4, 2021 | Easter Sunday | Canada |
| Sunday, April 4, 2021 | Easter Sunday | Congo |
| Sunday, April 4, 2021 | Easter Sunday | Switzerland |
| Sunday, April 4, 2021 | Easter Sunday | Cook Islands |
| Sunday, April 4, 2021 | Easter Sunday | Chile |
| Sunday, April 4, 2021 | Easter Sunday | Cameroon |
| Sunday, April 4, 2021 | Qing Ming Jie Holiday | China |
| Sunday, April 4, 2021 | Easter Sunday | Colombia |
| Sunday, April 4, 2021 | Easter Sunday | Cabo Verde |
| Sunday, April 4, 2021 | Easter Sunday | Curaçao |
| Sunday, April 4, 2021 | Easter Sunday | Czechia |
| Sunday, April 4, 2021 | Easter Sunday | Germany |
| Sunday, April 4, 2021 | Easter Sunday | Germany |
| Sunday, April 4, 2021 | Easter Sunday | Denmark |
| Sunday, April 4, 2021 | Easter Sunday | Ecuador |
| Sunday, April 4, 2021 | Easter Sunday | Estonia |
| Sunday, April 4, 2021 | Easter Sunday | Spain |
| Sunday, April 4, 2021 | Easter Sunday | Finland |
| Sunday, April 4, 2021 | Easter Sunday | Faroe Islands |
| Sunday, April 4, 2021 | Easter Sunday | France |
| Sunday, April 4, 2021 | Easter Sunday | Gabon |
| Sunday, April 4, 2021 | Easter Sunday | Grenada |
| Sunday, April 4, 2021 | Easter Sunday | French Guiana |
| Sunday, April 4, 2021 | Easter Sunday | Ghana |
| Sunday, April 4, 2021 | Easter Sunday | Gibraltar |
| Sunday, April 4, 2021 | Easter Sunday | Greenland |
| Sunday, April 4, 2021 | Easter Sunday | Guatemala |
| Sunday, April 4, 2021 | Easter Sunday | Guinea-Bissau |
| Sunday, April 4, 2021 | Tomb Sweeping Day | Hong Kong |
| Sunday, April 4, 2021 | Easter Sunday | Hong Kong |
| Sunday, April 4, 2021 | Easter Sunday | Honduras |
| Sunday, April 4, 2021 | Easter Sunday | Croatia |
| Sunday, April 4, 2021 | Easter Sunday | Haiti |
| Sunday, April 4, 2021 | Easter Sunday | Hungary |
| Sunday, April 4, 2021 | Easter Sunday | Indonesia |
| Sunday, April 4, 2021 | Easter Sunday | Ireland |
| Sunday, April 4, 2021 | Catholic/Protestant Easter Sunday | Israel |
| Sunday, April 4, 2021 | Mimouna Day | Israel |
| Sunday, April 4, 2021 | Easter Day | India |
| Sunday, April 4, 2021 | Easter Sunday | Iceland |
| Sunday, April 4, 2021 | Easter Sunday | Italy |
| Sunday, April 4, 2021 | Easter Sunday | Jamaica |
| Sunday, April 4, 2021 | Easter Sunday | Jordan |
| Sunday, April 4, 2021 | Easter Sunday | Kenya |
| Sunday, April 4, 2021 | Easter Sunday | Cayman Islands |
| Sunday, April 4, 2021 | Easter Sunday | Lebanon |
| Sunday, April 4, 2021 | Easter Sunday | Liechtenstein |
| Sunday, April 4, 2021 | Easter Sunday | Sri Lanka |
| Sunday, April 4, 2021 | Easter Sunday | Lithuania |
| Sunday, April 4, 2021 | Easter Sunday | Luxembourg |
| Sunday, April 4, 2021 | Easter Sunday | Latvia |
| Sunday, April 4, 2021 | Easter Sunday | Monaco |
| Sunday, April 4, 2021 | Easter Sunday | Montenegro |
| Sunday, April 4, 2021 | Easter Day | Saint Martin |
| Sunday, April 4, 2021 | Easter Sunday | Madagascar |
| Sunday, April 4, 2021 | Easter Sunday | North Macedonia |
| Sunday, April 4, 2021 | Cheng Ming Festival | Macau |
| Sunday, April 4, 2021 | Easter Sunday | Martinique |
| Sunday, April 4, 2021 | Easter Sunday | Malta |
| Sunday, April 4, 2021 | Easter Sunday | Mexico |
| Sunday, April 4, 2021 | Easter Sunday | Malaysia |
| Sunday, April 4, 2021 | Easter Sunday | Namibia |
| Sunday, April 4, 2021 | Easter Sunday | New Caledonia |
| Sunday, April 4, 2021 | Daylight Saving Time ends | Norfolk Island |
| Sunday, April 4, 2021 | Easter Sunday | Norfolk Island |
| Sunday, April 4, 2021 | Easter Sunday | Nigeria |
| Sunday, April 4, 2021 | Easter Sunday | Nicaragua |
| Sunday, April 4, 2021 | Easter Sunday | Netherlands |
| Sunday, April 4, 2021 | Easter Sunday | Norway |
| Sunday, April 4, 2021 | Easter Sunday | New Zealand |
| Sunday, April 4, 2021 | Easter Sunday | Panama |
| Sunday, April 4, 2021 | Easter Sunday | Peru |
| Sunday, April 4, 2021 | Easter Sunday | Papua New Guinea |
| Sunday, April 4, 2021 | Easter Sunday | Philippines |
| Sunday, April 4, 2021 | Easter Sunday | Pakistan |
| Sunday, April 4, 2021 | Easter Sunday | Poland |
| Sunday, April 4, 2021 | Easter Sunday | Puerto Rico |
| Sunday, April 4, 2021 | Easter Sunday | Portugal |
| Sunday, April 4, 2021 | Western Easter Sunday | Serbia |
| Sunday, April 4, 2021 | Easter Sunday | Solomon Islands |
| Sunday, April 4, 2021 | Easter Sunday | Seychelles |
| Sunday, April 4, 2021 | Easter Sunday | Sweden |
| Sunday, April 4, 2021 | Easter Sunday | Singapore |
| Sunday, April 4, 2021 | Easter Sunday | Saint Helena |
| Sunday, April 4, 2021 | Easter Sunday | Slovenia |
| Sunday, April 4, 2021 | Easter Sunday | Slovakia |
| Sunday, April 4, 2021 | Easter Sunday | San Marino |
| Sunday, April 4, 2021 | Independence Day | Senegal |
| Sunday, April 4, 2021 | Easter Sunday | Suriname |
| Sunday, April 4, 2021 | Easter Sunday | South Sudan |
| Sunday, April 4, 2021 | Easter Sunday | El Salvador |
| Sunday, April 4, 2021 | Easter Sunday | Sint Maarten |
| Sunday, April 4, 2021 | Easter Sunday | Syria |
| Sunday, April 4, 2021 | Easter Sunday | Trinidad and Tobago |
| Sunday, April 4, 2021 | Easter Sunday | Tuvalu |
| Sunday, April 4, 2021 | Children's Day | Taiwan |
| Sunday, April 4, 2021 | Easter Sunday | Taiwan |
| Sunday, April 4, 2021 | Easter Sunday | Tanzania |
| Sunday, April 4, 2021 | Easter Sunday | Uganda |
| Sunday, April 4, 2021 | Last day of Passover | United Kingdom |
| Sunday, April 4, 2021 | Easter Sunday | United Kingdom |
| Sunday, April 4, 2021 | Last Day of Passover | United States |
| Sunday, April 4, 2021 | United Nations' Mine Awareness Day | United States |
| Sunday, April 4, 2021 | Easter Sunday | United States |
| Sunday, April 4, 2021 | Easter Sunday | Uruguay |
| Sunday, April 4, 2021 | Easter Sunday | Vatican City (Holy See) |
| Sunday, April 4, 2021 | Easter Sunday | Venezuela |
| Sunday, April 4, 2021 | Easter Sunday | US Virgin Islands |
| Sunday, April 4, 2021 | Easter Sunday | Vietnam |
| Sunday, April 4, 2021 | Daylight Saving Time ends | Samoa |
| Sunday, April 4, 2021 | Easter | Kosovo |
| Sunday, April 4, 2021 | Easter Sunday | South Africa |
| Sunday, April 4, 2021 | Easter Sunday | Zambia |
| Sunday, April 4, 2021 | Easter Sunday | Zimbabwe |
| Monday, April 5, 2021 | Easter Monday | Andorra |
| Monday, April 5, 2021 | Easter Monday | Antigua and Barbuda |
| Monday, April 5, 2021 | Easter Monday | Anguilla |
| Monday, April 5, 2021 | Day off for Easter Sunday | Albania |
| Monday, April 5, 2021 | Easter Monday | Albania |
| Monday, April 5, 2021 | Easter Monday | Armenia |
| Monday, April 5, 2021 | Easter Monday | Austria |
| Monday, April 5, 2021 | Easter Monday | Australia |
| Monday, April 5, 2021 | Easter Monday | Aruba |
| Monday, April 5, 2021 | Easter Monday | Bosnia and Herzegovina |
| Monday, April 5, 2021 | Easter Monday | Barbados |
| Monday, April 5, 2021 | Easter Monday | Bangladesh |
| Monday, April 5, 2021 | Easter Monday | Belgium |
| Monday, April 5, 2021 | Easter Monday | Burkina Faso |
| Monday, April 5, 2021 | Easter Monday | Benin |
| Monday, April 5, 2021 | Easter Monday | St. Barts |
| Monday, April 5, 2021 | Easter Monday | The Bahamas |
| Monday, April 5, 2021 | Easter Monday | Botswana |
| Monday, April 5, 2021 | Easter Monday | Belize |
| Monday, April 5, 2021 | Easter Monday | Canada |
| Monday, April 5, 2021 | Easter Monday | Canada |
| Monday, April 5, 2021 | Easter Monday | Canada |
| Monday, April 5, 2021 | Easter Monday | Central African Republic |
| Monday, April 5, 2021 | Easter Monday | Congo |
| Monday, April 5, 2021 | Easter Monday | Switzerland |
| Monday, April 5, 2021 | Easter Monday | Switzerland |
| Monday, April 5, 2021 | Easter Monday | Cote d'Ivoire |
| Monday, April 5, 2021 | Easter Monday | Cook Islands |
| Monday, April 5, 2021 | Qing Ming Jie | China |
| Monday, April 5, 2021 | Easter Monday | Curaçao |
| Monday, April 5, 2021 | Easter Monday | Czechia |
| Monday, April 5, 2021 | Easter Monday | Germany |
| Monday, April 5, 2021 | Easter Monday | Denmark |
| Monday, April 5, 2021 | Easter Monday | Dominica |
| Monday, April 5, 2021 | Easter Monday | Spain |
| Monday, April 5, 2021 | Easter Monday | Spain |
| Monday, April 5, 2021 | Easter Monday | Finland |
| Monday, April 5, 2021 | Easter Monday | Fiji |
| Monday, April 5, 2021 | Easter Monday | Faroe Islands |
| Monday, April 5, 2021 | Easter Monday | France |
| Monday, April 5, 2021 | Easter Monday | Gabon |
| Monday, April 5, 2021 | Easter Monday | Grenada |
| Monday, April 5, 2021 | Easter Monday | French Guiana |
| Monday, April 5, 2021 | Easter Monday | Guernsey |
| Monday, April 5, 2021 | Easter Monday | Ghana |
| Monday, April 5, 2021 | Easter Monday | Gibraltar |
| Monday, April 5, 2021 | Easter Monday | Greenland |
| Monday, April 5, 2021 | Easter Monday | Gambia |
| Monday, April 5, 2021 | Easter Monday | Guinea |
| Monday, April 5, 2021 | Easter Monday | Guadeloupe |
| Monday, April 5, 2021 | Easter Monday | Guatemala |
| Monday, April 5, 2021 | Easter Monday | Guyana |
| Monday, April 5, 2021 | The Day Following Tomb Sweeping Day | Hong Kong |
| Monday, April 5, 2021 | Easter Monday | Hong Kong |
| Monday, April 5, 2021 | Easter Monday | Croatia |
| Monday, April 5, 2021 | Easter Monday | Hungary |
| Monday, April 5, 2021 | Easter Monday | Ireland |
| Monday, April 5, 2021 | Catholic/Protestant Easter Monday | Israel |
| Monday, April 5, 2021 | Easter Monday | Isle of Man |
| Monday, April 5, 2021 | Easter Monday | Iceland |
| Monday, April 5, 2021 | Easter Monday | Italy |
| Monday, April 5, 2021 | Easter Monday | Jersey |
| Monday, April 5, 2021 | Easter Monday | Jamaica |
| Monday, April 5, 2021 | Easter Monday | Jordan |
| Monday, April 5, 2021 | Easter Monday | Kenya |
| Monday, April 5, 2021 | Easter Monday | Kiribati |
| Monday, April 5, 2021 | Easter Monday | Saint Kitts and Nevis |
| Monday, April 5, 2021 | Arbor Day | South Korea |
| Monday, April 5, 2021 | Easter Monday | Cayman Islands |
| Monday, April 5, 2021 | Easter Monday | Lebanon |
| Monday, April 5, 2021 | Easter Monday | Saint Lucia |
| Monday, April 5, 2021 | Easter Monday | Liechtenstein |
| Monday, April 5, 2021 | Easter Monday | Lesotho |
| Monday, April 5, 2021 | Easter Monday | Lithuania |
| Monday, April 5, 2021 | Easter Monday | Luxembourg |
| Monday, April 5, 2021 | Easter Monday | Latvia |
| Monday, April 5, 2021 | Easter Monday | Monaco |
| Monday, April 5, 2021 | Easter Monday | Montenegro |
| Monday, April 5, 2021 | Easter Monday | Saint Martin |
| Monday, April 5, 2021 | Easter Monday | Madagascar |
| Monday, April 5, 2021 | Easter Monday | North Macedonia |
| Monday, April 5, 2021 | Easter Monday | Mali |
| Monday, April 5, 2021 | Holy Saturday Holiday | Macau |
| Monday, April 5, 2021 | Easter Monday | Martinique |
| Monday, April 5, 2021 | Easter Monday | Montserrat |
| Monday, April 5, 2021 | Easter Monday | Malta |
| Monday, April 5, 2021 | Easter Monday | Malawi |
| Monday, April 5, 2021 | Easter Monday | Namibia |
| Monday, April 5, 2021 | Easter Monday | New Caledonia |
| Monday, April 5, 2021 | Easter Monday | Niger |
| Monday, April 5, 2021 | Easter Monday | Norfolk Island |
| Monday, April 5, 2021 | Easter Monday | Nigeria |
| Monday, April 5, 2021 | Easter Monday | Netherlands |
| Monday, April 5, 2021 | Easter Monday | Norway |
| Monday, April 5, 2021 | Easter Monday | Nauru |
| Monday, April 5, 2021 | Easter Monday | New Zealand |
| Monday, April 5, 2021 | Easter Monday | French Polynesia |
| Monday, April 5, 2021 | Easter Monday | Papua New Guinea |
| Monday, April 5, 2021 | Easter Monday | Pakistan |
| Monday, April 5, 2021 | Easter Monday | Poland |
| Monday, April 5, 2021 | Easter Monday | Saint Pierre and Miquelon |
| Monday, April 5, 2021 | Easter Monday | Reunion |
| Monday, April 5, 2021 | Western Easter Monday | Serbia |
| Monday, April 5, 2021 | Easter Monday | Rwanda |
| Monday, April 5, 2021 | Easter Monday | Solomon Islands |
| Monday, April 5, 2021 | Easter Monday | Seychelles |
| Monday, April 5, 2021 | Easter Monday | Sweden |
| Monday, April 5, 2021 | Easter Monday | Saint Helena |
| Monday, April 5, 2021 | Easter Monday | Slovenia |
| Monday, April 5, 2021 | Easter Monday | Slovakia |
| Monday, April 5, 2021 | Easter Monday | Sierra Leone |
| Monday, April 5, 2021 | Easter Monday | San Marino |
| Monday, April 5, 2021 | Easter Monday | Senegal |
| Monday, April 5, 2021 | Easter Monday | Suriname |
| Monday, April 5, 2021 | Easter Monday | South Sudan |
| Monday, April 5, 2021 | Easter Monday | Sint Maarten |
| Monday, April 5, 2021 | Easter Monday | Eswatini |
| Monday, April 5, 2021 | Easter Monday | Turks and Caicos Islands |
| Monday, April 5, 2021 | Easter Monday | Chad |
| Monday, April 5, 2021 | Easter Monday | Togo |
| Monday, April 5, 2021 | Easter Monday | Tonga |
| Monday, April 5, 2021 | Easter Monday | Trinidad and Tobago |
| Monday, April 5, 2021 | Easter Monday | Tuvalu |
| Monday, April 5, 2021 | Tomb Sweeping Day | Taiwan |
| Monday, April 5, 2021 | Children's Day Holiday | Taiwan |
| Monday, April 5, 2021 | Easter Monday | Tanzania |
| Monday, April 5, 2021 | Easter Monday | Uganda |
| Monday, April 5, 2021 | Easter Monday | United Kingdom |
| Monday, April 5, 2021 | Easter Monday | United Kingdom |
| Monday, April 5, 2021 | International Day of Conscience | United States |
| Monday, April 5, 2021 | Easter Monday | United States |
| Monday, April 5, 2021 | Easter Monday | Vatican City (Holy See) |
| Monday, April 5, 2021 | Easter Monday | Saint Vincent and the Grenadines |
| Monday, April 5, 2021 | Easter Monday | British Virgin Islands |
| Monday, April 5, 2021 | Easter Monday | US Virgin Islands |
| Monday, April 5, 2021 | Easter Monday | Vanuatu |
| Monday, April 5, 2021 | Easter Monday | Wallis and Futuna |
| Monday, April 5, 2021 | Easter Monday | Samoa |
| Monday, April 5, 2021 | Easter Monday | Kosovo |
| Monday, April 5, 2021 | Easter Monday | Mayotte |
| Monday, April 5, 2021 | Family Day | South Africa |
| Monday, April 5, 2021 | Easter Monday | Zambia |
| Monday, April 5, 2021 | Easter Monday | Zimbabwe |
| Tuesday, April 6, 2021 | Self Determination Day | Australia |
| Tuesday, April 6, 2021 | Easter Tuesday | Australia |
| Tuesday, April 6, 2021 | President Ntaryamira Day | Burundi |
| Tuesday, April 6, 2021 | Tartan Day | Canada |
| Tuesday, April 6, 2021 | The Day Following Easter Monday | Hong Kong |
| Tuesday, April 6, 2021 | Cheng Ming Holiday | Macau |
| Tuesday, April 6, 2021 | Easter Tuesday | Nauru |
| Tuesday, April 6, 2021 | Southland Anniversary Day | New Zealand |
| Tuesday, April 6, 2021 | Chakri Day | Thailand |
| Tuesday, April 6, 2021 | International Day of Sport for Development and Peace | United States |
| Tuesday, April 6, 2021 | National Tartan Day | United States |
| Tuesday, April 6, 2021 | National Library Workers' Day | United States |
| Wednesday, April 7, 2021 | Motherhood and Beauty Day | Armenia |
| Wednesday, April 7, 2021 | Orthodox Feast of the Annunciation | Israel |
| Wednesday, April 7, 2021 | Yazidi New Year | Iraq |
| Wednesday, April 7, 2021 | April People's Revolution Day | Kyrgyzstan |
| Wednesday, April 7, 2021 | Health Day | Mongolia |
| Wednesday, April 7, 2021 | Mozambican Woman's Day | Mozambique |
| Wednesday, April 7, 2021 | Genocide Against the Tutsi Memorial Day | Rwanda |
| Wednesday, April 7, 2021 | World Health Day | Turkmenistan |
| Wednesday, April 7, 2021 | Karume Day | Tanzania |
| Wednesday, April 7, 2021 | United Nations' World Health Day | United States |
| Wednesday, April 7, 2021 | Day of Remembrance of the Victims of the Rwanda Genocide | United States |
| Thursday, April 8, 2021 | Yom HaShoah | Australia |
| Thursday, April 8, 2021 | Yom HaShoah | Canada |
| Thursday, April 8, 2021 | Näfels Procession | Switzerland |
| Thursday, April 8, 2021 | Yom HaShoah | Israel |
| Thursday, April 8, 2021 | International Romani Day (for Romani community) | North Macedonia |
| Thursday, April 8, 2021 | Yom HaShoah | United Kingdom |
| Thursday, April 8, 2021 | Yom HaShoah | United States |
| Thursday, April 8, 2021 | Day Before Polling Day | Samoa |
| Thursday, April 8, 2021 | Day of Romas | Kosovo |
| Friday, April 9, 2021 | Arrival Day of Sri Sri Harichand Tagore | Bangladesh |
| Friday, April 9, 2021 | Vimy Ridge Day | Canada |
| Friday, April 9, 2021 | Independence Restoration Day | Georgia |
| Friday, April 9, 2021 | Baghdad Liberation Day | Iraq |
| Friday, April 9, 2021 | Fall of the Defunct Dictatorial Regime and the Liberation of Iraq Day | Iraq |
| Friday, April 9, 2021 | National Health Day | Kiribati |
| Friday, April 9, 2021 | Fast and Prayer Day | Liberia |
| Friday, April 9, 2021 | The Day of Valor | Philippines |
| Friday, April 9, 2021 | Martyrs' Day | Tunisia |
| Friday, April 9, 2021 | Polling Day | Samoa |
| Friday, April 9, 2021 | Constitution Day of the Republic of Kosovo | Kosovo |
| Sunday, April 11, 2021 | Local elections | Chile |
| Sunday, April 11, 2021 | Battle of Rivas | Costa Rica |
| Sunday, April 11, 2021 | Centenary Celebration Holiday | Jordan |
| Sunday, April 11, 2021 | Daylight Saving Time ends | Morocco |
| Sunday, April 11, 2021 | Government Holiday | Maldives |
| Sunday, April 11, 2021 | Godhe Yatra | Nepal |
| Monday, April 12, 2021 | Children's Day | Bolivia |
| Monday, April 12, 2021 | Government Holiday | Maldives |
| Monday, April 12, 2021 | Songkran Holiday | Thailand |
| Monday, April 12, 2021 | International Day of Human Space Flight | United States |
| Tuesday, April 13, 2021 | Ramadan Start | United Arab Emirates |
| Tuesday, April 13, 2021 | First Day of Ramadan | Afghanistan |
| Tuesday, April 13, 2021 | Ramadan Start | Australia |
| Tuesday, April 13, 2021 | Chaitra Sankranti | Bangladesh |
| Tuesday, April 13, 2021 | Ramadan Start | Canada |
| Tuesday, April 13, 2021 | Chaitra Sukhladi | India |
| Tuesday, April 13, 2021 | Ugadi | India |
| Tuesday, April 13, 2021 | Gudi Padwa | India |
| Tuesday, April 13, 2021 | Ramadan begins | Jordan |
| Tuesday, April 13, 2021 | Sinhala and Tamil New Year's Eve | Sri Lanka |
| Tuesday, April 13, 2021 | Maha Thingyan (Water Festival) | Myanmar |
| Tuesday, April 13, 2021 | Ougadi | Mauritius |
| Tuesday, April 13, 2021 | Ramadan Start | Maldives |
| Tuesday, April 13, 2021 | First Day of Ramadan | Malaysia |
| Tuesday, April 13, 2021 | Ramadan starts | Russia |
| Tuesday, April 13, 2021 | Ramadan begins | Saudi Arabia |
| Tuesday, April 13, 2021 | Unfairly Prosecuted Persons Day | Slovakia |
| Tuesday, April 13, 2021 | Songkran | Thailand |
| Tuesday, April 13, 2021 | Ramadan Start | United Kingdom |
| Tuesday, April 13, 2021 | Ramadan Starts | United States |
| Tuesday, April 13, 2021 | Thomas Jefferson's Birthday | United States |
| Wednesday, April 14, 2021 | Bengali New Year | Bangladesh |
| Wednesday, April 14, 2021 | Ramadan begins | Brunei |
| Wednesday, April 14, 2021 | America Day | Honduras |
| Wednesday, April 14, 2021 | Yom HaZikaron | Israel |
| Wednesday, April 14, 2021 | Vaisakhi | India |
| Wednesday, April 14, 2021 | Mesadi | India |
| Wednesday, April 14, 2021 | Ambedkar Jayanti | India |
| Wednesday, April 14, 2021 | Khmer New Year Day (Day 1) | Cambodia |
| Wednesday, April 14, 2021 | General Election Day | Cayman Islands |
| Wednesday, April 14, 2021 | Lao New Year | Laos |
| Wednesday, April 14, 2021 | Sinhala and Tamil New Year's Day | Sri Lanka |
| Wednesday, April 14, 2021 | Ramadan Start | Morocco |
| Wednesday, April 14, 2021 | Maha Thingyan (Water Festival) | Myanmar |
| Wednesday, April 14, 2021 | Nepali New Year | Nepal |
| Wednesday, April 14, 2021 | Ramadan Start | Pakistan |
| Wednesday, April 14, 2021 | Ramadan Bank Holiday | Pakistan |
| Wednesday, April 14, 2021 | Baisakhi | Pakistan |
| Wednesday, April 14, 2021 | Songkran Holiday | Thailand |
| Wednesday, April 14, 2021 | World Chagas Disease Day | United States |
| Wednesday, April 14, 2021 | Ramadan Start | South Africa |
| Thursday, April 15, 2021 | Yom HaAtzmaut | Australia |
| Thursday, April 15, 2021 | Yom HaAtzmaut | Canada |
| Thursday, April 15, 2021 | Yom HaAtzmaut | Israel |
| Thursday, April 15, 2021 | Bahag Bihu | India |
| Thursday, April 15, 2021 | Khmer New Year Day (Day 2) | Cambodia |
| Thursday, April 15, 2021 | Birth Date of Kim Il Sung | North Korea |
| Thursday, April 15, 2021 | Lao New Year Holiday | Laos |
| Thursday, April 15, 2021 | Maha Thingyan (Water Festival) | Myanmar |
| Thursday, April 15, 2021 | Declaration of Malacca as Historical City | Malaysia |
| Thursday, April 15, 2021 | Songkran Holiday | Thailand |
| Thursday, April 15, 2021 | Yom HaAtzmaut | United Kingdom |
| Thursday, April 15, 2021 | Yom Ha'atzmaut | United States |
| Thursday, April 15, 2021 | World Art Day | United States |
| Thursday, April 15, 2021 | Father Damien Day | United States |
| Friday, April 16, 2021 | Armenian Cinema Day | Armenia |
| Friday, April 16, 2021 | Khmer New Year Day (Day 3) | Cambodia |
| Friday, April 16, 2021 | Lao New Year Holiday | Laos |
| Friday, April 16, 2021 | Maha Thingyan (Water Festival) | Myanmar |
| Friday, April 16, 2021 | José de Diego's Birthday | Puerto Rico |
| Friday, April 16, 2021 | Emancipation Day | United States |
| Friday, April 16, 2021 | Arbor Day | United States |
| Saturday, April 17, 2021 | Flag Day | American Samoa |
| Saturday, April 17, 2021 | Women's Rights Day | Gabon |
| Saturday, April 17, 2021 | Maha Thingyan (Water Festival) | Myanmar |
| Saturday, April 17, 2021 | Independence Day | Syria |
| Sunday, April 18, 2021 | Maha Thingyan (Water Festival) | Myanmar |
| Sunday, April 18, 2021 | International Day for Monuments and Sites | United States |
| Sunday, April 18, 2021 | Independence Day | Zimbabwe |
| Monday, April 19, 2021 | Taxpayers' Day | Armenia |
| Monday, April 19, 2021 | Sechseläuten | Switzerland |
| Monday, April 19, 2021 | Day off for America Day | Honduras |
| Monday, April 19, 2021 | Maha Thingyan (Water Festival) | Myanmar |
| Monday, April 19, 2021 | Birthday of King Mswati III | Eswatini |
| Monday, April 19, 2021 | Patriots' Day | United States |
| Monday, April 19, 2021 | Landing of the 33 orientals | Uruguay |
| Monday, April 19, 2021 | Declaration of Independence | Venezuela |
| Monday, April 19, 2021 | Independence Day observed | Zimbabwe |
| Tuesday, April 20, 2021 | Armenian Feast of the Annunciation | Israel |
| Tuesday, April 20, 2021 | Our Lady of Mércoles | Portugal |
| Tuesday, April 20, 2021 | Chinese Language Day | United States |
| Wednesday, April 21, 2021 | Tiradentes Day | Brazil |
| Wednesday, April 21, 2021 | Queen Elizabeth II's Birthday | Falkland Islands |
| Wednesday, April 21, 2021 | Rama Navami | India |
| Wednesday, April 21, 2021 | Ridván | Pakistan |
| Wednesday, April 21, 2021 | World Creativity and Innovation Day | United States |
| Wednesday, April 21, 2021 | San Jacinto Day | United States |
| Wednesday, April 21, 2021 | Administrative Professionals Day | United States |
| Wednesday, April 21, 2021 | Hung Kings Festival | Vietnam |
| Thursday, April 22, 2021 | Death Anniversary of Zhabdrung (Zhabdrung Kuchoe) | Bhutan |
| Thursday, April 22, 2021 | Girls' Day / Boys' Day | Germany |
| Thursday, April 22, 2021 | First Day of Summer | Iceland |
| Thursday, April 22, 2021 | Holocaust Remembrance Day | Serbia |
| Thursday, April 22, 2021 | Stephen Lawrence Day | United Kingdom |
| Thursday, April 22, 2021 | International Girls in ICT Day | United States |
| Thursday, April 22, 2021 | Earth Day | United States |
| Thursday, April 22, 2021 | Oklahoma Day | United States |
| Thursday, April 22, 2021 | Take our Daughters and Sons to Work Day | United States |
| Friday, April 23, 2021 | Language Day | Colombia |
| Friday, April 23, 2021 | German Beer Day | Germany |
| Friday, April 23, 2021 | Day of Aragón | Spain |
| Friday, April 23, 2021 | St George's Day | Spain |
| Friday, April 23, 2021 | Castile and León Day | Spain |
| Friday, April 23, 2021 | Funeral of Idriss Deby Itno | Chad |
| Friday, April 23, 2021 | National Sovereignty and Children's Day | Turkey |
| Friday, April 23, 2021 | St. George's Day | United Kingdom |
| Friday, April 23, 2021 | Shakespeare Day | United Kingdom |
| Friday, April 23, 2021 | World Book and Copyright Day | United States |
| Friday, April 23, 2021 | World Spanish Language Day | United States |
| Friday, April 23, 2021 | English Language Day | United States |
| Friday, April 23, 2021 | St George's Feast | Vatican City (Holy See) |
| Friday, April 23, 2021 | Day of Turks | Kosovo |
| Saturday, April 24, 2021 | Genocide Remembrance Day | Armenia |
| Saturday, April 24, 2021 | Action Day for Tolerance and Respect between People | Argentina |
| Saturday, April 24, 2021 | Children's Day | Colombia |
| Saturday, April 24, 2021 | Prophet Shuaib's Feast Eve | Israel |
| Saturday, April 24, 2021 | Concord Day | Niger |
| Saturday, April 24, 2021 | Loktantra Diwas | Nepal |
| Saturday, April 24, 2021 | International Day of Multilateralism and Diplomacy for Peace | United States |
| Sunday, April 25, 2021 | Citizens' Day | Armenia |
| Sunday, April 25, 2021 | ANZAC Day | Australia |
| Sunday, April 25, 2021 | ANZAC Day Observed | Australia |
| Sunday, April 25, 2021 | ANZAC Day | Cook Islands |
| Sunday, April 25, 2021 | Special Working Day | China |
| Sunday, April 25, 2021 | Sinai Liberation Day | Egypt |
| Sunday, April 25, 2021 | National Flag Day | Faroe Islands |
| Sunday, April 25, 2021 | Armenian/Orthodox Palm Sunday | Israel |
| Sunday, April 25, 2021 | Prophet Shuaib's Feast | Israel |
| Sunday, April 25, 2021 | Mahavir Jayanti | India |
| Sunday, April 25, 2021 | Liberation Day | Italy |
| Sunday, April 25, 2021 | The Feast of St Mark (Venice) | Italy |
| Sunday, April 25, 2021 | Chosun People's Army Foundation Day | North Korea |
| Sunday, April 25, 2021 | ANZAC Day | New Zealand |
| Sunday, April 25, 2021 | Liberty Day | Portugal |
| Sunday, April 25, 2021 | National Flag Day | Eswatini |
| Sunday, April 25, 2021 | Turkmen Horse Festival | Turkmenistan |
| Sunday, April 25, 2021 | ANZAC Day | Tonga |
| Sunday, April 25, 2021 | International Delegates' Day | United States |
| Sunday, April 25, 2021 | World Malaria Day | United States |
| Monday, April 26, 2021 | ANZAC Day Observed | Australia |
| Monday, April 26, 2021 | Day of Remembrance of the Chernobyl Tragedy | Belarus |
| Monday, April 26, 2021 | St. George's Day | Canada |
| Monday, April 26, 2021 | Secretaries' Day | Colombia |
| Monday, April 26, 2021 | Prophet Shuaib's Feast Holiday | Israel |
| Monday, April 26, 2021 | Visak Bochea Day | Cambodia |
| Monday, April 26, 2021 | Bak Full Moon Poya Day | Sri Lanka |
| Monday, April 26, 2021 | Intellectual Property Day | Mongolia |
| Monday, April 26, 2021 | Birthday of the Sultan of Terengganu | Malaysia |
| Monday, April 26, 2021 | Day off for ANZAC Day | New Zealand |
| Monday, April 26, 2021 | Day off for National Flag Day | Eswatini |
| Monday, April 26, 2021 | God of Medicine's Birthday | Taiwan |
| Monday, April 26, 2021 | Union Day | Tanzania |
| Monday, April 26, 2021 | World Intellectual Property Day | United States |
| Monday, April 26, 2021 | International Chernobyl Disaster Remembrance Day | United States |
| Monday, April 26, 2021 | Arbor Day | United States |
| Monday, April 26, 2021 | Confederate Memorial Day | United States |
| Monday, April 26, 2021 | Confederate Memorial Day | United States |
| Monday, April 26, 2021 | Confederate Memorial Day | United States |
| Monday, April 26, 2021 | State Holiday | United States |
| Tuesday, April 27, 2021 | King's Day | Aruba |
| Tuesday, April 27, 2021 | King's Birthday | Curaçao |
| Tuesday, April 27, 2021 | Prophet Shuaib's Feast Holiday | Israel |
| Tuesday, April 27, 2021 | State Flag Day | Moldova |
| Tuesday, April 27, 2021 | King's Birthday | Netherlands |
| Tuesday, April 27, 2021 | Day of Uprising Against Occupation | Slovenia |
| Tuesday, April 27, 2021 | Independence Day | Sierra Leone |
| Tuesday, April 27, 2021 | King's Day | Sint Maarten |
| Tuesday, April 27, 2021 | Independence Day | Togo |
| Tuesday, April 27, 2021 | Abolition Day | Mayotte |
| Tuesday, April 27, 2021 | Freedom Day | South Africa |
| Wednesday, April 28, 2021 | Afghan Victory Day | Afghanistan |
| Wednesday, April 28, 2021 | National Heroes Day | Barbados |
| Wednesday, April 28, 2021 | Workers' Memorial Day | Gibraltar |
| Wednesday, April 28, 2021 | Prophet Shuaib's Feast Holiday | Israel |
| Wednesday, April 28, 2021 | World Day for Safety and Health at Work | United States |
| Wednesday, April 28, 2021 | St. Pierre Chanel Day | Wallis and Futuna |
| Thursday, April 29, 2021 | Day of Trees | Colombia |
| Thursday, April 29, 2021 | Day off for Sinai Liberation Day | Egypt |
| Thursday, April 29, 2021 | Armenian/Orthodox Maundy Thursday | Israel |
| Thursday, April 29, 2021 | Shōwa Day | Japan |
| Thursday, April 29, 2021 | Nuzul Al-Quran | Malaysia |
| Friday, April 30, 2021 | Good Friday (Orthodox) | Albania |
| Friday, April 30, 2021 | Lag B'Omer | Australia |
| Friday, April 30, 2021 | Orthodox Good Friday | Australia |
| Friday, April 30, 2021 | Orthodox Good Friday | Bosnia and Herzegovina |
| Friday, April 30, 2021 | Good Friday | Bulgaria |
| Friday, April 30, 2021 | Nuzul Al-Qur'an | Brunei |
| Friday, April 30, 2021 | Lag B'Omer | Canada |
| Friday, April 30, 2021 | Orthodox Good Friday | Canada |
| Friday, April 30, 2021 | Education Day | Congo Democratic Republic |
| Friday, April 30, 2021 | Good Friday (Orthodox) | Cyprus |
| Friday, April 30, 2021 | Walpurgis Night | Germany |
| Friday, April 30, 2021 | Great Prayer Day | Denmark |
| Friday, April 30, 2021 | Day off for Labor Day | Ecuador |
| Friday, April 30, 2021 | Coptic Good Friday | Egypt |
| Friday, April 30, 2021 | Coptic Good Friday | Eritrea |
| Friday, April 30, 2021 | Ethiopian Good Friday | Ethiopia |
| Friday, April 30, 2021 | Prayer Day | Faroe Islands |
| Friday, April 30, 2021 | Orthodox Good Friday | Georgia |
| Friday, April 30, 2021 | Great Prayer Day | Greenland |
| Friday, April 30, 2021 | Orthodox Good Friday | Greece |
| Friday, April 30, 2021 | Day of the Deaths of Zrinski and Frankopan | Croatia |
| Friday, April 30, 2021 | Lag BaOmer | Israel |
| Friday, April 30, 2021 | Armenian/Orthodox Good Friday | Israel |
| Friday, April 30, 2021 | Orthodox Good Friday | Jordan |
| Friday, April 30, 2021 | Royal Plowing Ceremony | Cambodia |
| Friday, April 30, 2021 | Orthodox Good Friday | Lebanon |
| Friday, April 30, 2021 | Orthodox Good Friday | Moldova |
| Friday, April 30, 2021 | Orthodox Good Friday | Montenegro |
| Friday, April 30, 2021 | Day off for Constitution Day | Marshall Islands |
| Friday, April 30, 2021 | Good Friday (Orthodox) | North Macedonia |
| Friday, April 30, 2021 | Children's Day | Mexico |
| Friday, April 30, 2021 | Orthodox Good Friday | Romania |
| Friday, April 30, 2021 | Good Friday | Serbia |
| Friday, April 30, 2021 | Walpurgis Night | Sweden |
| Friday, April 30, 2021 | Day off for Labour Day | Sao Tome and Principe |
| Friday, April 30, 2021 | Carnival Day | Sint Maarten |
| Friday, April 30, 2021 | Labor Day Holiday | Taiwan |
| Friday, April 30, 2021 | Lag B'Omer | United Kingdom |
| Friday, April 30, 2021 | Orthodox Good Friday | United Kingdom |
| Friday, April 30, 2021 | Lag BaOmer | United States |
| Friday, April 30, 2021 | Orthodox Good Friday | United States |
| Friday, April 30, 2021 | International Jazz Day | United States |
| Friday, April 30, 2021 | Arbor Day | United States |
| Friday, April 30, 2021 | Arbor Day | United States |
| Friday, April 30, 2021 | Kentucky Oaks | United States |
| Friday, April 30, 2021 | Liberation Day/Reunification Day | Vietnam |