May 2021 Holidays & Observances Worldwide
There is a total of 811 public holidays and observances in May 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.
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| Date | Holiday | Location |
|---|---|---|
| Saturday, May 1, 2021 | May Day | Andorra |
| Saturday, May 1, 2021 | Labor Day | Afghanistan |
| Saturday, May 1, 2021 | Easter Saturday (Orthodox) | Albania |
| Saturday, May 1, 2021 | International Worker's Day | Albania |
| Saturday, May 1, 2021 | Labor Day | Armenia |
| Saturday, May 1, 2021 | May Day | Angola |
| Saturday, May 1, 2021 | Labor Day | Argentina |
| Saturday, May 1, 2021 | Orthodox Holy Saturday | Australia |
| Saturday, May 1, 2021 | Labor Day | Aruba |
| Saturday, May 1, 2021 | Orthodox Holy Saturday | Bosnia and Herzegovina |
| Saturday, May 1, 2021 | Labor Day | Barbados |
| Saturday, May 1, 2021 | May Day | Bangladesh |
| Saturday, May 1, 2021 | Labor Day | Belgium |
| Saturday, May 1, 2021 | Labour Day | Burkina Faso |
| Saturday, May 1, 2021 | Holy Saturday | Bulgaria |
| Saturday, May 1, 2021 | Labor Day | Bulgaria |
| Saturday, May 1, 2021 | May Day | Bahrain |
| Saturday, May 1, 2021 | Labour Day | Burundi |
| Saturday, May 1, 2021 | Labor Day | St. Barts |
| Saturday, May 1, 2021 | Nuzul Al-Qur'an observed | Brunei |
| Saturday, May 1, 2021 | Labor Day | Bolivia |
| Saturday, May 1, 2021 | Labour Day | Botswana |
| Saturday, May 1, 2021 | Labor Day | Belize |
| Saturday, May 1, 2021 | Orthodox Holy Saturday | Canada |
| Saturday, May 1, 2021 | May Day | Congo Democratic Republic |
| Saturday, May 1, 2021 | Labour Day | Central African Republic |
| Saturday, May 1, 2021 | May Day (Half-Day) | Switzerland |
| Saturday, May 1, 2021 | Labor Day | Cote d'Ivoire |
| Saturday, May 1, 2021 | Labour Day | Cameroon |
| Saturday, May 1, 2021 | Labor Day | Colombia |
| Saturday, May 1, 2021 | Labour Day | Cabo Verde |
| Saturday, May 1, 2021 | Labor Day | Curaçao |
| Saturday, May 1, 2021 | Labour Day/May Day | Cyprus |
| Saturday, May 1, 2021 | Holy Saturday (Orthodox) | Cyprus |
| Saturday, May 1, 2021 | Labor Day | Czechia |
| Saturday, May 1, 2021 | May Day | Germany |
| Saturday, May 1, 2021 | Labor Day | Djibouti |
| Saturday, May 1, 2021 | May Day | Algeria |
| Saturday, May 1, 2021 | Labor Day | Ecuador |
| Saturday, May 1, 2021 | Coptic Holy Saturday | Egypt |
| Saturday, May 1, 2021 | Labor Day | Egypt |
| Saturday, May 1, 2021 | International Workers' Day | Eritrea |
| Saturday, May 1, 2021 | Labor Day | Spain |
| Saturday, May 1, 2021 | International Labor Day | Ethiopia |
| Saturday, May 1, 2021 | May Day | Finland |
| Saturday, May 1, 2021 | Labor Day | France |
| Saturday, May 1, 2021 | Labour Day | Gabon |
| Saturday, May 1, 2021 | Orthodox Holy Saturday | Georgia |
| Saturday, May 1, 2021 | Labor Day | French Guiana |
| Saturday, May 1, 2021 | May Day | Ghana |
| Saturday, May 1, 2021 | Labour Day | Gambia |
| Saturday, May 1, 2021 | Labor Day | Guadeloupe |
| Saturday, May 1, 2021 | Labour Day | Guinea-Bissau |
| Saturday, May 1, 2021 | Labor Day | Guyana |
| Saturday, May 1, 2021 | Labour Day | Hong Kong |
| Saturday, May 1, 2021 | Labor Day | Honduras |
| Saturday, May 1, 2021 | International Labor Day | Indonesia |
| Saturday, May 1, 2021 | Armenian/Orthodox Holy Saturday | Israel |
| Saturday, May 1, 2021 | May Day | Israel |
| Saturday, May 1, 2021 | International Worker's Day | India |
| Saturday, May 1, 2021 | Labor Day | Iraq |
| Saturday, May 1, 2021 | Labour Day | Iceland |
| Saturday, May 1, 2021 | Labor Day | Italy |
| Saturday, May 1, 2021 | Labour Day | Jordan |
| Saturday, May 1, 2021 | May Day | Kyrgyzstan |
| Saturday, May 1, 2021 | Labour Day | Cambodia |
| Saturday, May 1, 2021 | May Day | North Korea |
| Saturday, May 1, 2021 | Labor Day | South Korea |
| Saturday, May 1, 2021 | Unity Day | Kazakhstan |
| Saturday, May 1, 2021 | Labor Day | Laos |
| Saturday, May 1, 2021 | Labour Day/May Day | Liechtenstein |
| Saturday, May 1, 2021 | May Day | Sri Lanka |
| Saturday, May 1, 2021 | Labour Day | Lithuania |
| Saturday, May 1, 2021 | Labor Day | Luxembourg |
| Saturday, May 1, 2021 | Labour Day/May Day | Latvia |
| Saturday, May 1, 2021 | Constituent Assembly Convocation Day | Latvia |
| Saturday, May 1, 2021 | May Day | Libya |
| Saturday, May 1, 2021 | Labour Day/May Day | Morocco |
| Saturday, May 1, 2021 | Labour Day | Monaco |
| Saturday, May 1, 2021 | Orthodox Holy Saturday | Moldova |
| Saturday, May 1, 2021 | International Day of Solidarity of Workers | Moldova |
| Saturday, May 1, 2021 | Labour Day | Montenegro |
| Saturday, May 1, 2021 | Labor Day | Saint Martin |
| Saturday, May 1, 2021 | Constitution Day | Marshall Islands |
| Saturday, May 1, 2021 | Easter Saturday (Orthodox) | North Macedonia |
| Saturday, May 1, 2021 | Labor Day | North Macedonia |
| Saturday, May 1, 2021 | Workers' Day | Mali |
| Saturday, May 1, 2021 | Labor Day | Myanmar |
| Saturday, May 1, 2021 | Labour Day/May Day | Malta |
| Saturday, May 1, 2021 | Labour Day | Mauritius |
| Saturday, May 1, 2021 | Labor Day | Maldives |
| Saturday, May 1, 2021 | May Day | Malawi |
| Saturday, May 1, 2021 | Labor Day | Mexico |
| Saturday, May 1, 2021 | Labour Day | Malaysia |
| Saturday, May 1, 2021 | May Day | Mozambique |
| Saturday, May 1, 2021 | Workers' Day | Namibia |
| Saturday, May 1, 2021 | Labor Day | New Caledonia |
| Saturday, May 1, 2021 | Labour Day | Niger |
| Saturday, May 1, 2021 | Workers' Day | Nigeria |
| Saturday, May 1, 2021 | Labor Day | Nicaragua |
| Saturday, May 1, 2021 | Majdoor Divas | Nepal |
| Saturday, May 1, 2021 | Labor Day | Panama |
| Saturday, May 1, 2021 | Labour Day | Pakistan |
| Saturday, May 1, 2021 | Labor Day | Poland |
| Saturday, May 1, 2021 | Labour Day | Reunion |
| Saturday, May 1, 2021 | Labor Day | Romania |
| Saturday, May 1, 2021 | Labor holiday | Serbia |
| Saturday, May 1, 2021 | Holy Saturday | Serbia |
| Saturday, May 1, 2021 | Spring and Labor Day | Russia |
| Saturday, May 1, 2021 | Labor Day | Rwanda |
| Saturday, May 1, 2021 | Labour Day | Seychelles |
| Saturday, May 1, 2021 | May 1st | Sweden |
| Saturday, May 1, 2021 | Labour Day | Singapore |
| Saturday, May 1, 2021 | Labor Day | Slovenia |
| Saturday, May 1, 2021 | Accession to the European Union Day | Slovakia |
| Saturday, May 1, 2021 | International Worker's Day | Sierra Leone |
| Saturday, May 1, 2021 | Labour Day/May Day | San Marino |
| Saturday, May 1, 2021 | Labour Day | Senegal |
| Saturday, May 1, 2021 | May Day | Somalia |
| Saturday, May 1, 2021 | Labor Day | Suriname |
| Saturday, May 1, 2021 | May Day | South Sudan |
| Saturday, May 1, 2021 | Labour Day | Sao Tome and Principe |
| Saturday, May 1, 2021 | Labor Day | El Salvador |
| Saturday, May 1, 2021 | May Day | Eswatini |
| Saturday, May 1, 2021 | Labour Day | Togo |
| Saturday, May 1, 2021 | Labor Day | Thailand |
| Saturday, May 1, 2021 | Labour Day | Tunisia |
| Saturday, May 1, 2021 | Labor and Solidarity Day | Turkey |
| Saturday, May 1, 2021 | Labor Day | Taiwan |
| Saturday, May 1, 2021 | Labour Day | Tanzania |
| Saturday, May 1, 2021 | Labor Day | Ukraine |
| Saturday, May 1, 2021 | Labour Day | Uganda |
| Saturday, May 1, 2021 | Orthodox Holy Saturday | United Kingdom |
| Saturday, May 1, 2021 | Kentucky Derby | United States |
| Saturday, May 1, 2021 | Law Day | United States |
| Saturday, May 1, 2021 | Loyalty Day | United States |
| Saturday, May 1, 2021 | National Explosive Ordnance Disposal (EOD) Day | United States |
| Saturday, May 1, 2021 | Lei Day | United States |
| Saturday, May 1, 2021 | First Day of Military Appreciation Month | United States |
| Saturday, May 1, 2021 | First Day of Asian Pacific American Heritage Month | United States |
| Saturday, May 1, 2021 | First Day of Jewish American Heritage Month | United States |
| Saturday, May 1, 2021 | Labor Day | Uruguay |
| Saturday, May 1, 2021 | Feast of St Joseph the Worker | Vatican City (Holy See) |
| Saturday, May 1, 2021 | National Workers Day | Saint Vincent and the Grenadines |
| Saturday, May 1, 2021 | Labor Day | Venezuela |
| Saturday, May 1, 2021 | International Labor Day | Vietnam |
| Saturday, May 1, 2021 | Labor Day | Vanuatu |
| Saturday, May 1, 2021 | International Labour Day | Kosovo |
| Saturday, May 1, 2021 | May Day | Yemen |
| Saturday, May 1, 2021 | Labour Day | Mayotte |
| Saturday, May 1, 2021 | Workers' Day | South Africa |
| Saturday, May 1, 2021 | Labour Day | Zambia |
| Saturday, May 1, 2021 | Workers' Day | Zimbabwe |
| Sunday, May 2, 2021 | Mother's Day | Andorra |
| Sunday, May 2, 2021 | Easter Sunday (Orthodox) | Albania |
| Sunday, May 2, 2021 | Orthodox Easter | Australia |
| Sunday, May 2, 2021 | Orthodox Easter Sunday | Bosnia and Herzegovina |
| Sunday, May 2, 2021 | Easter Sunday | Bulgaria |
| Sunday, May 2, 2021 | May Day | Bahrain |
| Sunday, May 2, 2021 | Birth Anniversary of Third Druk Gyalpo | Bhutan |
| Sunday, May 2, 2021 | Orthodox Easter Sunday | Belarus |
| Sunday, May 2, 2021 | Orthodox Easter | Canada |
| Sunday, May 2, 2021 | Labour Day Holiday | China |
| Sunday, May 2, 2021 | Easter Sunday (Orthodox) | Cyprus |
| Sunday, May 2, 2021 | Coptic Easter Sunday | Egypt |
| Sunday, May 2, 2021 | Coptic Easter | Eritrea |
| Sunday, May 2, 2021 | Mother's Day | Spain |
| Sunday, May 2, 2021 | Fasika | Ethiopia |
| Sunday, May 2, 2021 | Orthodox Easter Sunday | Georgia |
| Sunday, May 2, 2021 | Orthodox Easter | Croatia |
| Sunday, May 2, 2021 | Mother's Day | Hungary |
| Sunday, May 2, 2021 | Armenian/Orthodox Easter Sunday | Israel |
| Sunday, May 2, 2021 | Orthodox Easter Day | Jordan |
| Sunday, May 2, 2021 | Orthodox Easter | Lebanon |
| Sunday, May 2, 2021 | Martyrs' Day | Lebanon |
| Sunday, May 2, 2021 | Mother's Day | Lithuania |
| Sunday, May 2, 2021 | Orthodox Easter Sunday | Moldova |
| Sunday, May 2, 2021 | Labour Day Holiday | Montenegro |
| Sunday, May 2, 2021 | Easter Sunday (Orthodox) | North Macedonia |
| Sunday, May 2, 2021 | Day of the Flag | Poland |
| Sunday, May 2, 2021 | Mother's Day | Portugal |
| Sunday, May 2, 2021 | Orthodox Easter | Romania |
| Sunday, May 2, 2021 | Mother's Day | Romania |
| Sunday, May 2, 2021 | Easter Day | Serbia |
| Sunday, May 2, 2021 | Orthodox Easter | Russia |
| Sunday, May 2, 2021 | Coptic Easter | Sudan |
| Sunday, May 2, 2021 | Labour Day holiday | Slovenia |
| Sunday, May 2, 2021 | Orthodox Easter | Syria |
| Sunday, May 2, 2021 | Orthodox Easter Day | Ukraine |
| Sunday, May 2, 2021 | Orthodox Easter | United Kingdom |
| Sunday, May 2, 2021 | World Tuna Day | United States |
| Sunday, May 2, 2021 | International Family Equality Day | United States |
| Sunday, May 2, 2021 | Easter Sunday (Orthodox) | Kosovo |
| Monday, May 3, 2021 | Labour Day | Antigua and Barbuda |
| Monday, May 3, 2021 | Day off for Labor Day | Anguilla |
| Monday, May 3, 2021 | Easter Monday (Orthodox) | Albania |
| Monday, May 3, 2021 | Day off for Easter Sunday (Orthodox) | Albania |
| Monday, May 3, 2021 | Day off for International Worker's Day | Albania |
| Monday, May 3, 2021 | Orthodox Easter Monday | Australia |
| Monday, May 3, 2021 | May Day | Australia |
| Monday, May 3, 2021 | Labour Day | Australia |
| Monday, May 3, 2021 | Labor Day (Day 2) | Bosnia and Herzegovina |
| Monday, May 3, 2021 | Orthodox Easter Monday | Bosnia and Herzegovina |
| Monday, May 3, 2021 | Easter Monday | Bulgaria |
| Monday, May 3, 2021 | Day off for Labor Day | Botswana |
| Monday, May 3, 2021 | Orthodox Easter Monday | Canada |
| Monday, May 3, 2021 | Labour Day Holiday | China |
| Monday, May 3, 2021 | Labor Day | Costa Rica |
| Monday, May 3, 2021 | Easter Monday (Orthodox) | Cyprus |
| Monday, May 3, 2021 | Labor Day | Dominica |
| Monday, May 3, 2021 | Spring Festival | Egypt |
| Monday, May 3, 2021 | Day of Madrid | Spain |
| Monday, May 3, 2021 | Orthodox Easter Monday | Georgia |
| Monday, May 3, 2021 | May Day | Guernsey |
| Monday, May 3, 2021 | May Day observed | Ghana |
| Monday, May 3, 2021 | Day off for May Day | Gibraltar |
| Monday, May 3, 2021 | Orthodox Easter Monday | Greece |
| Monday, May 3, 2021 | Labor Day Holiday | Guatemala |
| Monday, May 3, 2021 | Orthodox Easter Monday | Croatia |
| Monday, May 3, 2021 | May Day | Ireland |
| Monday, May 3, 2021 | Armenian/Orthodox Easter Monday | Israel |
| Monday, May 3, 2021 | Early May Bank Holiday | Isle of Man |
| Monday, May 3, 2021 | Orthodox Easter Monday | Jordan |
| Monday, May 3, 2021 | Constitution Memorial Day | Japan |
| Monday, May 3, 2021 | Labor Day | Saint Kitts and Nevis |
| Monday, May 3, 2021 | Day off for Unity Day | Kazakhstan |
| Monday, May 3, 2021 | Day off for Labor Day | Laos |
| Monday, May 3, 2021 | Orthodox Easter Monday | Lebanon |
| Monday, May 3, 2021 | Public Holiday | Latvia |
| Monday, May 3, 2021 | Orthodox Easter Monday | Moldova |
| Monday, May 3, 2021 | Labour Day Holiday observed | Montenegro |
| Monday, May 3, 2021 | Easter Monday (Orthodox) | North Macedonia |
| Monday, May 3, 2021 | May Day Holiday | Macau |
| Monday, May 3, 2021 | Labour Day | Montserrat |
| Monday, May 3, 2021 | Day off for May Day | Malawi |
| Monday, May 3, 2021 | Day off for Workers' Day | Nigeria |
| Monday, May 3, 2021 | Day off for Labor Day | Nicaragua |
| Monday, May 3, 2021 | Constitution Day | Poland |
| Monday, May 3, 2021 | Orthodox Easter Monday | Romania |
| Monday, May 3, 2021 | Easter Monday | Serbia |
| Monday, May 3, 2021 | Labor Day Holiday | Serbia |
| Monday, May 3, 2021 | Day off for Spring and Labor Day | Russia |
| Monday, May 3, 2021 | Labor Day observed | Rwanda |
| Monday, May 3, 2021 | Day off for May Day | South Sudan |
| Monday, May 3, 2021 | Day of the Cross | El Salvador |
| Monday, May 3, 2021 | Day off for May Day | Eswatini |
| Monday, May 3, 2021 | Day off for Labour Day | Togo |
| Monday, May 3, 2021 | Labor Day observed | Thailand |
| Monday, May 3, 2021 | Day off for Labor Day | Ukraine |
| Monday, May 3, 2021 | Orthodox Easter Monday | United Kingdom |
| Monday, May 3, 2021 | Early May Bank Holiday | United Kingdom |
| Monday, May 3, 2021 | Orthodox Easter Monday | United States |
| Monday, May 3, 2021 | World Press Freedom Day | United States |
| Monday, May 3, 2021 | Day off for International Labor Day | Vietnam |
| Monday, May 3, 2021 | Easter Monday (Orthodox) | Kosovo |
| Monday, May 3, 2021 | Day off for International Labour Day | Kosovo |
| Tuesday, May 4, 2021 | Saint Florian's Day | Austria |
| Tuesday, May 4, 2021 | Day off for Labor Day | Bulgaria |
| Tuesday, May 4, 2021 | Labour Day Holiday | China |
| Tuesday, May 4, 2021 | Youth Day | China |
| Tuesday, May 4, 2021 | Easter Tuesday (Orthodox) | Cyprus |
| Tuesday, May 4, 2021 | Nationwide Public Holiday | Georgia |
| Tuesday, May 4, 2021 | Day off for Labor Day | Greece |
| Tuesday, May 4, 2021 | Martyrdom of Imam Ali | Iran |
| Tuesday, May 4, 2021 | Greenery Day | Japan |
| Tuesday, May 4, 2021 | Independence Restoration Day | Latvia |
| Tuesday, May 4, 2021 | Cassinga Day | Namibia |
| Tuesday, May 4, 2021 | Remembrance Day | Netherlands |
| Tuesday, May 4, 2021 | Day off for Labor holiday | Serbia |
| Tuesday, May 4, 2021 | Spring and Labor Day Holiday | Russia |
| Tuesday, May 4, 2021 | Death Anniversary of M. R. Štefánik | Slovakia |
| Tuesday, May 4, 2021 | Coronation Day | Thailand |
| Tuesday, May 4, 2021 | Literary Day | Taiwan |
| Tuesday, May 4, 2021 | Matsu's Birthday | Taiwan |
| Tuesday, May 4, 2021 | Orthodox Easter Monday | Ukraine |
| Tuesday, May 4, 2021 | Kent State Shootings Remembrance | United States |
| Tuesday, May 4, 2021 | Rhode Island Independence Day | United States |
| Tuesday, May 4, 2021 | National Teacher Appreciation Day | United States |
| Wednesday, May 5, 2021 | Labour Day Holiday | China |
| Wednesday, May 5, 2021 | Europe Day (Council of Europe) | Germany |
| Wednesday, May 5, 2021 | Liberation Day | Denmark |
| Wednesday, May 5, 2021 | Patriots' Day | Ethiopia |
| Wednesday, May 5, 2021 | Nationwide Public Holiday | Georgia |
| Wednesday, May 5, 2021 | Arrival Day | Guyana |
| Wednesday, May 5, 2021 | Children's Day | Japan |
| Wednesday, May 5, 2021 | Constitution Day of the Kyrgyz Republic | Kyrgyzstan |
| Wednesday, May 5, 2021 | Children's Day | South Korea |
| Wednesday, May 5, 2021 | Battle of Puebla (Cinco de Mayo) | Mexico |
| Wednesday, May 5, 2021 | Liberation Day | Netherlands |
| Wednesday, May 5, 2021 | Senior Citizens Day | Palau |
| Wednesday, May 5, 2021 | Spring and Labor Day Holiday | Russia |
| Wednesday, May 5, 2021 | World Portuguese Language Day | United States |
| Wednesday, May 5, 2021 | Cinco de Mayo | United States |
| Thursday, May 6, 2021 | St. George's Day | Bulgaria |
| Thursday, May 6, 2021 | Nationwide Public Holiday | Georgia |
| Thursday, May 6, 2021 | Spring and Labor Day Holiday | Russia |
| Thursday, May 6, 2021 | Martyrs' Day | Syria |
| Thursday, May 6, 2021 | National Nurses Day | United States |
| Thursday, May 6, 2021 | National Day of Prayer | United States |
| Thursday, May 6, 2021 | West Virginia Day of Prayer | United States |
| Thursday, May 6, 2021 | Day of Gorans | Kosovo |
| Friday, May 7, 2021 | Jumatul Bidah | Bangladesh |
| Friday, May 7, 2021 | Nationwide Public Holiday | Georgia |
| Friday, May 7, 2021 | Jamat Ul-Vida | India |
| Friday, May 7, 2021 | Defender of the Fatherland Day | Kazakhstan |
| Friday, May 7, 2021 | Spring and Labor Day Holiday | Russia |
| Friday, May 7, 2021 | Soldiers' Day | El Salvador |
| Friday, May 7, 2021 | Truman Day observed | United States |
| Friday, May 7, 2021 | Military Spouse Appreciation Day | United States |
| Saturday, May 8, 2021 | Yerkrapah Day | Armenia |
| Saturday, May 8, 2021 | Lailat al-Qadr | Australia |
| Saturday, May 8, 2021 | Iris Day | Belgium |
| Saturday, May 8, 2021 | Victory Day | St. Barts |
| Saturday, May 8, 2021 | Lailat al-Qadr | Canada |
| Saturday, May 8, 2021 | Special Working Day | China |
| Saturday, May 8, 2021 | Victory in Europe Day | Czechia |
| Saturday, May 8, 2021 | Anniversary of the End of World War II | Germany |
| Saturday, May 8, 2021 | WWII Victory Day | France |
| Saturday, May 8, 2021 | Nationwide Public Holiday | Georgia |
| Saturday, May 8, 2021 | Victory Day | French Guiana |
| Saturday, May 8, 2021 | WWII Victory Day | Guadeloupe |
| Saturday, May 8, 2021 | Parents' Day | South Korea |
| Saturday, May 8, 2021 | Special Working Day | Latvia |
| Saturday, May 8, 2021 | 1945 Victory Day | Saint Martin |
| Saturday, May 8, 2021 | Victory Day | Martinique |
| Saturday, May 8, 2021 | Day of Liberation | Norway |
| Saturday, May 8, 2021 | Victory Day | French Polynesia |
| Saturday, May 8, 2021 | WWII Victory Day | Reunion |
| Saturday, May 8, 2021 | Eid al-Fitr Holiday | Saudi Arabia |
| Saturday, May 8, 2021 | Day of Victory Over Fascism | Slovakia |
| Saturday, May 8, 2021 | Lailat al-Qadr | United Kingdom |
| Saturday, May 8, 2021 | Time of Remembrance and Reconciliation for Those Who Lost Their Lives during the Second World War | United States |
| Saturday, May 8, 2021 | World Migratory Bird Day | United States |
| Saturday, May 8, 2021 | World Ovarian Cancer Day | United States |
| Saturday, May 8, 2021 | World Red Cross and Red Crescent Day | United States |
| Saturday, May 8, 2021 | Truman Day | United States |
| Saturday, May 8, 2021 | Victory in Europe Day | United States |
| Saturday, May 8, 2021 | Victory Day | Wallis and Futuna |
| Sunday, May 9, 2021 | Victory and Peace Day | Armenia |
| Sunday, May 9, 2021 | Mother's Day | Austria |
| Sunday, May 9, 2021 | Victory Day over Fascism | Azerbaijan |
| Sunday, May 9, 2021 | Victory Day | Bosnia and Herzegovina |
| Sunday, May 9, 2021 | Mother's Day | Barbados |
| Sunday, May 9, 2021 | Victory Day | Belarus |
| Sunday, May 9, 2021 | Day of the National Emblem and Flag of Belarus | Belarus |
| Sunday, May 9, 2021 | Mother's Day | Canada |
| Sunday, May 9, 2021 | Day After Laila tou-Kadr | Cote d'Ivoire |
| Sunday, May 9, 2021 | Mother's Day | Colombia |
| Sunday, May 9, 2021 | Europe Day (European Union) | Germany |
| Sunday, May 9, 2021 | Mother's Day | Denmark |
| Sunday, May 9, 2021 | Victory Day | Georgia |
| Sunday, May 9, 2021 | Liberation Day (except Alderney and Sark) | Guernsey |
| Sunday, May 9, 2021 | Mother's Day | Ghana |
| Sunday, May 9, 2021 | Lailat al-Qadr | Gambia |
| Sunday, May 9, 2021 | Mother's Day | Greece |
| Sunday, May 9, 2021 | Europe Day and Victory Day Over Fascism | Croatia |
| Sunday, May 9, 2021 | Mother's Day | Croatia |
| Sunday, May 9, 2021 | Birthday of Rabindranath | India |
| Sunday, May 9, 2021 | Mother's Day | Iceland |
| Sunday, May 9, 2021 | Liberation Day | Jersey |
| Sunday, May 9, 2021 | Mother's Day | Jamaica |
| Sunday, May 9, 2021 | Victory Day | Kyrgyzstan |
| Sunday, May 9, 2021 | Mother's Day | Cayman Islands |
| Sunday, May 9, 2021 | Victory Day | Kazakhstan |
| Sunday, May 9, 2021 | Liberation and Resistance Holiday | Lebanon |
| Sunday, May 9, 2021 | Mother's Day | Liechtenstein |
| Sunday, May 9, 2021 | Europe Day | Luxembourg |
| Sunday, May 9, 2021 | Mother's Day | Latvia |
| Sunday, May 9, 2021 | Victory Day | Moldova |
| Sunday, May 9, 2021 | Europe Day | Moldova |
| Sunday, May 9, 2021 | Leylatoul Qadr | Mali |
| Sunday, May 9, 2021 | Mother's Day | Malta |
| Sunday, May 9, 2021 | Lailat al-Qadr | Niger |
| Sunday, May 9, 2021 | Mother's Day | Netherlands |
| Sunday, May 9, 2021 | Eid al-Fitr Public Sector Holiday | Qatar |
| Sunday, May 9, 2021 | Father's Day | Romania |
| Sunday, May 9, 2021 | Victory Day | Serbia |
| Sunday, May 9, 2021 | Lailat al-Qadr | Russia |
| Sunday, May 9, 2021 | Victory Day | Russia |
| Sunday, May 9, 2021 | Eid al-Fitr Holiday | Saudi Arabia |
| Sunday, May 9, 2021 | Mother's Day | Singapore |
| Sunday, May 9, 2021 | Victory Day | Tajikistan |
| Sunday, May 9, 2021 | Mother's Day | Trinidad and Tobago |
| Sunday, May 9, 2021 | Victory Day | Ukraine |
| Sunday, May 9, 2021 | Mother's Day | Uganda |
| Sunday, May 9, 2021 | Remembrance Day | Uzbekistan |
| Sunday, May 9, 2021 | Mother's Day | Vatican City (Holy See) |
| Sunday, May 9, 2021 | Europe Day | Kosovo |
| Sunday, May 9, 2021 | Lailat al-Qadr | South Africa |
| Sunday, May 9, 2021 | Mother's Day | South Africa |
| Monday, May 10, 2021 | Day off for Victory Day over Fascism | Azerbaijan |
| Monday, May 10, 2021 | Shab-e-qadr | Bangladesh |
| Monday, May 10, 2021 | Public Holiday | Belarus |
| Monday, May 10, 2021 | Constitution Day | Micronesia |
| Monday, May 10, 2021 | Nationwide Public Holiday | Georgia |
| Monday, May 10, 2021 | Liberation Day (only Sark) | Guernsey |
| Monday, May 10, 2021 | Day off for Lailat al-Qadr | Guinea |
| Monday, May 10, 2021 | Mother's Day (Working Mothers Only) | Guatemala |
| Monday, May 10, 2021 | Jerusalem Day | Israel |
| Monday, May 10, 2021 | Memorial Day for Ethiopian Jews | Israel |
| Monday, May 10, 2021 | Day off for Victory Day | Kazakhstan |
| Monday, May 10, 2021 | Memorial Day | Moldova |
| Monday, May 10, 2021 | Mother's Day | Mexico |
| Monday, May 10, 2021 | Eid-ul-Fitr Holiday | Pakistan |
| Monday, May 10, 2021 | Eid al-Fitr Holiday | Qatar |
| Monday, May 10, 2021 | Monarchy Day | Romania |
| Monday, May 10, 2021 | Day off for Victory Day | Russia |
| Monday, May 10, 2021 | Eid al-Fitr Holiday | Saudi Arabia |
| Monday, May 10, 2021 | Mother's Day | El Salvador |
| Monday, May 10, 2021 | Royal Ploughing Ceremony Day | Thailand |
| Monday, May 10, 2021 | Day off for Victory Day | Tajikistan |
| Monday, May 10, 2021 | Gospel Day | Tuvalu |
| Monday, May 10, 2021 | Day off for Victory Day | Ukraine |
| Monday, May 10, 2021 | International Day of Argania | United States |
| Monday, May 10, 2021 | Confederate Memorial Day | United States |
| Monday, May 10, 2021 | Mother's Day | Samoa |
| Monday, May 10, 2021 | Day off for Europe Day | Kosovo |
| Tuesday, May 11, 2021 | Eid al-Fitr Holiday | United Arab Emirates |
| Tuesday, May 11, 2021 | Radonitsa | Belarus |
| Tuesday, May 11, 2021 | Nationwide Public Holiday | Georgia |
| Tuesday, May 11, 2021 | Eid al-Fitr Holiday | Jordan |
| Tuesday, May 11, 2021 | Eid-ul-Fitr Holiday | Pakistan |
| Tuesday, May 11, 2021 | Eid al-Fitr Holiday | Qatar |
| Tuesday, May 11, 2021 | Eid al-Fitr holiday | Yemen |
| Wednesday, May 12, 2021 | Eid al-Fitr Holiday | United Arab Emirates |
| Wednesday, May 12, 2021 | Aid el-Fitr | Cote d'Ivoire |
| Wednesday, May 12, 2021 | Eid el Fitr Holiday | Egypt |
| Wednesday, May 12, 2021 | St Andrew's Day | Georgia |
| Wednesday, May 12, 2021 | Eid al-Fitr Holiday | Gambia |
| Wednesday, May 12, 2021 | Idul Fitri Joint Holiday | Indonesia |
| Wednesday, May 12, 2021 | Catholic/Protestant Ascension Eve | Israel |
| Wednesday, May 12, 2021 | Eid al-Fitr Holiday | Jordan |
| Wednesday, May 12, 2021 | Eid al-Fitr holiday | Kuwait |
| Wednesday, May 12, 2021 | Eid al-Fitr | Mali |
| Wednesday, May 12, 2021 | Eid El-Fitr Holiday | Nigeria |
| Wednesday, May 12, 2021 | Eid al-Fitr Holiday | Oman |
| Wednesday, May 12, 2021 | Eid-ul-Fitr Holiday | Pakistan |
| Wednesday, May 12, 2021 | St. Joana's Day | Portugal |
| Wednesday, May 12, 2021 | Eid al-Fitr Holiday | Qatar |
| Wednesday, May 12, 2021 | Korité | Senegal |
| Wednesday, May 12, 2021 | Mother's Day | South Sudan |
| Wednesday, May 12, 2021 | Eid al-Fitr | South Sudan |
| Wednesday, May 12, 2021 | Ramadan Feast Eve | Turkey |
| Wednesday, May 12, 2021 | Inauguration Day | Uganda |
| Wednesday, May 12, 2021 | International Nurses Day | United States |
| Wednesday, May 12, 2021 | Eid al-Fitr Eve | Yemen |
| Thursday, May 13, 2021 | Ascension Day | Andorra |
| Thursday, May 13, 2021 | Eid al-Fitr | United Arab Emirates |
| Thursday, May 13, 2021 | End of Ramadan | Argentina |
| Thursday, May 13, 2021 | Ascension Day | Austria |
| Thursday, May 13, 2021 | Eid ul Fitr | Australia |
| Thursday, May 13, 2021 | Hari Raya Puasa | Australia |
| Thursday, May 13, 2021 | Ascension Day | Aruba |
| Thursday, May 13, 2021 | Ramadan holiday | Azerbaijan |
| Thursday, May 13, 2021 | Eid al-Fitr | Bosnia and Herzegovina |
| Thursday, May 13, 2021 | Ascension Day | Belgium |
| Thursday, May 13, 2021 | Eid al-Fitr | Burkina Faso |
| Thursday, May 13, 2021 | Eid al-Fitr Holiday | Bahrain |
| Thursday, May 13, 2021 | Eid ul Fitr | Burundi |
| Thursday, May 13, 2021 | Ascension Day | Burundi |
| Thursday, May 13, 2021 | Korité | Benin |
| Thursday, May 13, 2021 | Ascension Day | St. Barts |
| Thursday, May 13, 2021 | Eid ul Fitr | Canada |
| Thursday, May 13, 2021 | Ascension Day | Central African Republic |
| Thursday, May 13, 2021 | Eid al-Fitr | Central African Republic |
| Thursday, May 13, 2021 | Ascension Day | Congo |
| Thursday, May 13, 2021 | Eid al-Fitr | Cameroon |
| Thursday, May 13, 2021 | Ascension Day | Curaçao |
| Thursday, May 13, 2021 | Father's Day | Germany |
| Thursday, May 13, 2021 | Ascension Day | Germany |
| Thursday, May 13, 2021 | Eid ul Fitr | Germany |
| Thursday, May 13, 2021 | Eid al-Fitr | Djibouti |
| Thursday, May 13, 2021 | Ascension Day | Denmark |
| Thursday, May 13, 2021 | Eid al-Fitr | Algeria |
| Thursday, May 13, 2021 | Eid el Fitr | Egypt |
| Thursday, May 13, 2021 | Eid al-Fitr | Eritrea |
| Thursday, May 13, 2021 | Ascension Day | Finland |
| Thursday, May 13, 2021 | Eid al-Fitr | Gabon |
| Thursday, May 13, 2021 | Ascension Day | French Guiana |
| Thursday, May 13, 2021 | Eid ul-Fitr | Ghana |
| Thursday, May 13, 2021 | Ascension Day | Greenland |
| Thursday, May 13, 2021 | Eid al-Fitr | Gambia |
| Thursday, May 13, 2021 | Ascension Day | Guadeloupe |
| Thursday, May 13, 2021 | Eid al-Fitr | Guinea-Bissau |
| Thursday, May 13, 2021 | Ramadan Bayram | Croatia |
| Thursday, May 13, 2021 | Idul Fitri | Indonesia |
| Thursday, May 13, 2021 | Ascension Day of Jesus Christ | Indonesia |
| Thursday, May 13, 2021 | Ascension Day | Ireland |
| Thursday, May 13, 2021 | Catholic/Protestant Ascension Day | Israel |
| Thursday, May 13, 2021 | Eid al-Fitr | Iraq |
| Thursday, May 13, 2021 | Eid-e-Fetr | Iran |
| Thursday, May 13, 2021 | Ascension Day | Iceland |
| Thursday, May 13, 2021 | Eid al-Fitr | Jordan |
| Thursday, May 13, 2021 | Orozo Ait | Kyrgyzstan |
| Thursday, May 13, 2021 | Eid al-Fitr | Comoros |
| Thursday, May 13, 2021 | Ascension Day | Lebanon |
| Thursday, May 13, 2021 | Eid al-Fitr | Lebanon |
| Thursday, May 13, 2021 | Ascension Day | Liechtenstein |
| Thursday, May 13, 2021 | Eid al-Fitr | Libya |
| Thursday, May 13, 2021 | Ascension Day | Monaco |
| Thursday, May 13, 2021 | Ramdan Bayram | Montenegro |
| Thursday, May 13, 2021 | Ascension Day | Saint Martin |
| Thursday, May 13, 2021 | Eid al-Fitr | Madagascar |
| Thursday, May 13, 2021 | Ascension Day | Martinique |
| Thursday, May 13, 2021 | Eid ul-Fitr | Mauritania |
| Thursday, May 13, 2021 | Eid-ul-Fithr | Maldives |
| Thursday, May 13, 2021 | Ascension Day | Mexico |
| Thursday, May 13, 2021 | Hari Raya Puasa | Malaysia |
| Thursday, May 13, 2021 | Ascension Day | Namibia |
| Thursday, May 13, 2021 | Eid El-Fitr | Nigeria |
| Thursday, May 13, 2021 | Ascension Day | Netherlands |
| Thursday, May 13, 2021 | Eid al-Fitr | Oman |
| Thursday, May 13, 2021 | Ascension Day | French Polynesia |
| Thursday, May 13, 2021 | Eid al-Fitr | Philippines |
| Thursday, May 13, 2021 | Eid-ul-Fitr | Pakistan |
| Thursday, May 13, 2021 | Ascension Day | Saint Pierre and Miquelon |
| Thursday, May 13, 2021 | Eid al-Fitr | Qatar |
| Thursday, May 13, 2021 | Ascension Day | Reunion |
| Thursday, May 13, 2021 | Eid al-Fitr | Serbia |
| Thursday, May 13, 2021 | Ascension Day | Sweden |
| Thursday, May 13, 2021 | Hari Raya Puasa | Singapore |
| Thursday, May 13, 2021 | Eid al-Fitr | Sierra Leone |
| Thursday, May 13, 2021 | Ascension Day | Senegal |
| Thursday, May 13, 2021 | Eid al-Fitr | Somalia |
| Thursday, May 13, 2021 | Eid al-Fitr Holiday | South Sudan |
| Thursday, May 13, 2021 | Ascension Day | Sint Maarten |
| Thursday, May 13, 2021 | Eid al-Fitr | Syria |
| Thursday, May 13, 2021 | Ascension Day | Eswatini |
| Thursday, May 13, 2021 | Eid al-Fitr | Chad |
| Thursday, May 13, 2021 | Ascension Day | Togo |
| Thursday, May 13, 2021 | Eid al-Fitr | Togo |
| Thursday, May 13, 2021 | Eid ul Fitr | Tajikistan |
| Thursday, May 13, 2021 | Oraza Bayram | Turkmenistan |
| Thursday, May 13, 2021 | Eid al-Fitr | Tunisia |
| Thursday, May 13, 2021 | Ramadan Feast | Turkey |
| Thursday, May 13, 2021 | Eid al-Fitr | Trinidad and Tobago |
| Thursday, May 13, 2021 | Ramadan Bayram | Ukraine |
| Thursday, May 13, 2021 | Eid al-Fitr | Uganda |
| Thursday, May 13, 2021 | Ascension Day | United Kingdom |
| Thursday, May 13, 2021 | Eid ul Fitr | United Kingdom |
| Thursday, May 13, 2021 | Ascension Day | United States |
| Thursday, May 13, 2021 | Eid al-Fitr | United States |
| Thursday, May 13, 2021 | Ascension Day | Vatican City (Holy See) |
| Thursday, May 13, 2021 | Eid al-Fitr | Kosovo |
| Thursday, May 13, 2021 | Ascension Day | Mayotte |
| Friday, May 14, 2021 | Eid al-Fitr Holiday | United Arab Emirates |
| Friday, May 14, 2021 | Ramadan holiday | Azerbaijan |
| Friday, May 14, 2021 | Eid ul-Fitr | Bangladesh |
| Friday, May 14, 2021 | Day after Ascension Day | Belgium |
| Friday, May 14, 2021 | Eid al-Fitr Holiday | Bahrain |
| Friday, May 14, 2021 | Eid al-Fitr | Brunei |
| Friday, May 14, 2021 | Bridge Public Holiday | Congo |
| Friday, May 14, 2021 | Public Holiday | Cameroon |
| Friday, May 14, 2021 | Eid al-Fitr Holiday | Djibouti |
| Friday, May 14, 2021 | Bank Holiday | Denmark |
| Friday, May 14, 2021 | Eid al-Fitr Holiday | Algeria |
| Friday, May 14, 2021 | Eid el Fitr Holiday | Egypt |
| Friday, May 14, 2021 | Idul Fitri Holiday | Indonesia |
| Friday, May 14, 2021 | Ramzan Id | India |
| Friday, May 14, 2021 | Eid al-Fitr holiday | Iraq |
| Friday, May 14, 2021 | Eid-e-Fetr Holiday | Iran |
| Friday, May 14, 2021 | Eid al-Fitr Holiday | Jordan |
| Friday, May 14, 2021 | Idd ul-Fitr | Kenya |
| Friday, May 14, 2021 | King's Birthday | Cambodia |
| Friday, May 14, 2021 | Eid al-Fitr Holiday | Comoros |
| Friday, May 14, 2021 | Eid al-Fitr holiday | Kuwait |
| Friday, May 14, 2021 | Eid al-Fitr Holiday | Lebanon |
| Friday, May 14, 2021 | Eid al-Fitr | Sri Lanka |
| Friday, May 14, 2021 | National Unification Day | Liberia |
| Friday, May 14, 2021 | Eid al-Fitr Holiday | Libya |
| Friday, May 14, 2021 | Ramdan Bayram Holiday | Montenegro |
| Friday, May 14, 2021 | Eid al-Fitr | Mauritius |
| Friday, May 14, 2021 | Eid-ul-Fithr Holiday | Maldives |
| Friday, May 14, 2021 | Eid al-Fitr | Malawi |
| Friday, May 14, 2021 | Kamuzu Day | Malawi |
| Friday, May 14, 2021 | Hari Raya Puasa Day 2 | Malaysia |
| Friday, May 14, 2021 | Ramjan Edul Fikra | Nepal |
| Friday, May 14, 2021 | Eid al-Fitr Holiday | Oman |
| Friday, May 14, 2021 | Eid-ul-Fitr Holiday | Pakistan |
| Friday, May 14, 2021 | National Holiday | Paraguay |
| Friday, May 14, 2021 | Eid al-Fitr Holiday | Qatar |
| Friday, May 14, 2021 | SPLA Day | South Sudan |
| Friday, May 14, 2021 | Eid al-Fitr Holiday | Tunisia |
| Friday, May 14, 2021 | Ramadan Feast Holiday | Turkey |
| Friday, May 14, 2021 | Eid el Fitri | Tanzania |
| Friday, May 14, 2021 | Native American Day | United States |
| Friday, May 14, 2021 | Eid al-Fitr Holiday | Uzbekistan |
| Friday, May 14, 2021 | Eid al-Fitr holiday | Yemen |
| Friday, May 14, 2021 | Eid al-Fitr | Mayotte |
| Friday, May 14, 2021 | Eid ul Fitr | South Africa |
| Saturday, May 15, 2021 | Eid al-Fitr Holiday | United Arab Emirates |
| Saturday, May 15, 2021 | Family Day | Armenia |
| Saturday, May 15, 2021 | Eid ul-Fitr Holiday | Bangladesh |
| Saturday, May 15, 2021 | Eid al-Fitr Holiday | Brunei |
| Saturday, May 15, 2021 | Special Working Day | Belarus |
| Saturday, May 15, 2021 | Teacher's Day | Colombia |
| Saturday, May 15, 2021 | Eid el Fitr Holiday | Egypt |
| Saturday, May 15, 2021 | Eid al-Fitr holiday | Iraq |
| Saturday, May 15, 2021 | Eid al-Fitr Holiday | Jordan |
| Saturday, May 15, 2021 | Teacher's Day | South Korea |
| Saturday, May 15, 2021 | Eid al-Fitr holiday | Kuwait |
| Saturday, May 15, 2021 | Eid al-Fitr Holiday | Libya |
| Saturday, May 15, 2021 | Family Day | Moldova |
| Saturday, May 15, 2021 | Ramdan Bayram Holiday | Montenegro |
| Saturday, May 15, 2021 | Family Day | Mongolia |
| Saturday, May 15, 2021 | Eid-ul-Fithr Holiday | Maldives |
| Saturday, May 15, 2021 | Teacher's Day | Mexico |
| Saturday, May 15, 2021 | Eid al-Fitr Holiday | Oman |
| Saturday, May 15, 2021 | Eid-ul-Fitr Holiday | Pakistan |
| Saturday, May 15, 2021 | Independence Day | Paraguay |
| Saturday, May 15, 2021 | Eid al-Fitr Holiday | Qatar |
| Saturday, May 15, 2021 | Ramadan Feast Holiday | Turkey |
| Saturday, May 15, 2021 | Eid el Fitri Holiday | Tanzania |
| Saturday, May 15, 2021 | Europe Day | Ukraine |
| Saturday, May 15, 2021 | International Day of Families | United States |
| Saturday, May 15, 2021 | Public Lands Day | United States |
| Saturday, May 15, 2021 | Peace Officers Memorial Day | United States |
| Saturday, May 15, 2021 | Armed Forces Day | United States |
| Saturday, May 15, 2021 | Preakness Stakes | United States |
| Saturday, May 15, 2021 | Eid al-Fitr Holiday | Uzbekistan |
| Sunday, May 16, 2021 | Day of Students and Youth | Armenia |
| Sunday, May 16, 2021 | Eid ul-Fitr Holiday | Bangladesh |
| Sunday, May 16, 2021 | Eid el Fitr Holiday | Egypt |
| Sunday, May 16, 2021 | Remembrance Day of Croatian Victims in the Fight for Freedom and Independence | Croatia |
| Sunday, May 16, 2021 | Shavuot Eve | Israel |
| Sunday, May 16, 2021 | Eid al-Fitr holiday | Kuwait |
| Sunday, May 16, 2021 | Daylight Saving Time starts | Morocco |
| Sunday, May 16, 2021 | Eid al-Fitr Holiday | Qatar |
| Sunday, May 16, 2021 | SPLA Day | South Sudan |
| Sunday, May 16, 2021 | International Day of Living Together in Peace | United States |
| Sunday, May 16, 2021 | International Day of Light | United States |
| Monday, May 17, 2021 | Shavuot | Australia |
| Monday, May 17, 2021 | Eid al-Fitr Holiday | Brunei |
| Monday, May 17, 2021 | Shavuot | Canada |
| Monday, May 17, 2021 | Liberation Day | Congo Democratic Republic |
| Monday, May 17, 2021 | Ascension Day | Colombia |
| Monday, May 17, 2021 | First Day of Shavuot | Germany |
| Monday, May 17, 2021 | Galicia Literature Day | Spain |
| Monday, May 17, 2021 | Idul Fitri Joint Holiday | Indonesia |
| Monday, May 17, 2021 | Shavuot | Israel |
| Monday, May 17, 2021 | Discovery Day | Cayman Islands |
| Monday, May 17, 2021 | Day off for Eid al-Fitr | Malawi |
| Monday, May 17, 2021 | 17 May Constitution Day (1814) | Norway |
| Monday, May 17, 2021 | Constitution Day | Nauru |
| Monday, May 17, 2021 | Eid al-Fitr Holiday | Qatar |
| Monday, May 17, 2021 | SPLA Day | South Sudan |
| Monday, May 17, 2021 | Shavuot | United Kingdom |
| Monday, May 17, 2021 | World Telecommunication and Information Society Day | United States |
| Monday, May 17, 2021 | Tax Day | United States |
| Tuesday, May 18, 2021 | Second Day of Shavuot | Germany |
| Tuesday, May 18, 2021 | Flag Day | Haiti |
| Tuesday, May 18, 2021 | Idul Fitri Joint Holiday | Indonesia |
| Tuesday, May 18, 2021 | Eid al-Fitr Holiday | Qatar |
| Tuesday, May 18, 2021 | International Museum Day | Singapore |
| Tuesday, May 18, 2021 | Restoration of Somaliland Sovereignty | Somalia |
| Tuesday, May 18, 2021 | Constitution Day | Turkmenistan |
| Tuesday, May 18, 2021 | Battle of Las Piedras | Uruguay |
| Wednesday, May 19, 2021 | Buddha's Birthday | Hong Kong |
| Wednesday, May 19, 2021 | Idul Fitri Joint Holiday | Indonesia |
| Wednesday, May 19, 2021 | Buddha's Birthday | South Korea |
| Wednesday, May 19, 2021 | Restoration of Somaliland Sovereignty Holiday | Somalia |
| Wednesday, May 19, 2021 | Commemoration of Atatürk, Youth and Sports Day | Turkey |
| Wednesday, May 19, 2021 | Buddha's Birthday | Taiwan |
| Wednesday, May 19, 2021 | Emergency Medical Services for Children Day | United States |
| Thursday, May 20, 2021 | National Day | Cameroon |
| Thursday, May 20, 2021 | Independence Day | Cuba |
| Thursday, May 20, 2021 | Restoration of Independence Day | East Timor |
| Thursday, May 20, 2021 | World Bee Day | United States |
| Thursday, May 20, 2021 | World Autoimmune / Autoinflammatory Arthritis Day | United States |
| Friday, May 21, 2021 | Navy Day | Chile |
| Friday, May 21, 2021 | Independence Day | Montenegro |
| Friday, May 21, 2021 | Saint Helena Day | Saint Helena |
| Friday, May 21, 2021 | World Day for Cultural Diversity for Dialogue and Development | United States |
| Friday, May 21, 2021 | International Tea Day | United States |
| Friday, May 21, 2021 | National Defense Transportation Day | United States |
| Saturday, May 22, 2021 | Catholic/Protestant Pentecost Eve | Israel |
| Saturday, May 22, 2021 | Bălți Day | Moldova |
| Saturday, May 22, 2021 | Independence Day Holiday | Montenegro |
| Saturday, May 22, 2021 | Abolition Day | Martinique |
| Saturday, May 22, 2021 | Pahang State Holiday | Malaysia |
| Saturday, May 22, 2021 | Pentecost Eve | Norway |
| Saturday, May 22, 2021 | Leiria Day | Portugal |
| Saturday, May 22, 2021 | Pentecost Eve | Sweden |
| Saturday, May 22, 2021 | International Day for Biological Diversity | United States |
| Saturday, May 22, 2021 | National Maritime Day | United States |
| Saturday, May 22, 2021 | Harvey Milk Day | United States |
| Saturday, May 22, 2021 | Unity Day | Yemen |
| Sunday, May 23, 2021 | Pentecost Sunday | Andorra |
| Sunday, May 23, 2021 | Pentecost | Australia |
| Sunday, May 23, 2021 | Pentecost Sunday | Barbados |
| Sunday, May 23, 2021 | Pentecost | Canada |
| Sunday, May 23, 2021 | Pentecost Sunday | Czechia |
| Sunday, May 23, 2021 | Constitution Day | Germany |
| Sunday, May 23, 2021 | Pentecost Sunday | Denmark |
| Sunday, May 23, 2021 | Pentecost | Estonia |
| Sunday, May 23, 2021 | Pentecost Sunday/Pentecost | Spain |
| Sunday, May 23, 2021 | Pentecost Sunday | Finland |
| Sunday, May 23, 2021 | Pentecost | Ireland |
| Sunday, May 23, 2021 | Catholic/Protestant Pentecost | Israel |
| Sunday, May 23, 2021 | Pentecost Sunday | Iceland |
| Sunday, May 23, 2021 | Labor Day | Jamaica |
| Sunday, May 23, 2021 | Pentecost Sunday | Liechtenstein |
| Sunday, May 23, 2021 | Whitsunday | Latvia |
| Sunday, May 23, 2021 | Pentecost Sunday | Monaco |
| Sunday, May 23, 2021 | Vlach's National Day (for Vlach community) | North Macedonia |
| Sunday, May 23, 2021 | Pentecost Sunday | Martinique |
| Sunday, May 23, 2021 | Portalegre Day | Portugal |
| Sunday, May 23, 2021 | Pentecost Sunday | Sweden |
| Sunday, May 23, 2021 | Carpet Day | Turkmenistan |
| Sunday, May 23, 2021 | Pentecost | United Kingdom |
| Sunday, May 23, 2021 | International Day to End Obstetric Fistula | United States |
| Sunday, May 23, 2021 | Pentecost Sunday | Mayotte |
| Monday, May 24, 2021 | Pentecost Monday | Andorra |
| Monday, May 24, 2021 | Tourist Bridge Holiday | Argentina |
| Monday, May 24, 2021 | Pentecost Monday | Austria |
| Monday, May 24, 2021 | Culture and Literacy Day | Bulgaria |
| Monday, May 24, 2021 | Pentecost Monday | Benin |
| Monday, May 24, 2021 | Commonwealth Day | Belize |
| Monday, May 24, 2021 | Pentecost Monday | Canada |
| Monday, May 24, 2021 | National Patriots' Day | Canada |
| Monday, May 24, 2021 | Victoria Day | Canada |
| Monday, May 24, 2021 | Pentecost Monday | Central African Republic |
| Monday, May 24, 2021 | The Battle of Pichincha | Ecuador |
| Monday, May 24, 2021 | Independence Day | Eritrea |
| Monday, May 24, 2021 | Pentecost Monday | Spain |
| Monday, May 24, 2021 | Catholic/Protestant Pentecost Monday | Israel |
| Monday, May 24, 2021 | Pentecost Monday | Iceland |
| Monday, May 24, 2021 | Labor Day observed | Jamaica |
| Monday, May 24, 2021 | Pentecost Monday | Saint Kitts and Nevis |
| Monday, May 24, 2021 | Vesak Holiday - Public Sector | Sri Lanka |
| Monday, May 24, 2021 | Pentecost Monday | Luxembourg |
| Monday, May 24, 2021 | Saints Cyril and Methodius' Day | North Macedonia |
| Monday, May 24, 2021 | Pentecost Monday | Mali |
| Monday, May 24, 2021 | Azores Day | Portugal |
| Monday, May 24, 2021 | Pentecost Monday | Reunion |
| Monday, May 24, 2021 | Ascension Day Holiday | Venezuela |
| Monday, May 24, 2021 | Pentecost Monday | British Virgin Islands |
| Tuesday, May 25, 2021 | National Day/May 1810 Revolution | Argentina |
| Tuesday, May 25, 2021 | African Union Day | Ghana |
| Tuesday, May 25, 2021 | Africa Day | Gambia |
| Tuesday, May 25, 2021 | Independence Day | Jordan |
| Tuesday, May 25, 2021 | Liberation and Resistance Day | Lebanon |
| Tuesday, May 25, 2021 | Vesak Holiday - Public Sector | Sri Lanka |
| Tuesday, May 25, 2021 | Africa Day | Lesotho |
| Tuesday, May 25, 2021 | Full Moon Day of Kasong | Myanmar |
| Tuesday, May 25, 2021 | Africa Day | Mauritania |
| Tuesday, May 25, 2021 | Ashgabat City Day | Turkmenistan |
| Tuesday, May 25, 2021 | African Liberation Day | United States |
| Tuesday, May 25, 2021 | National Missing Children's Day | United States |
| Tuesday, May 25, 2021 | Africa Freedom Day | Zambia |
| Tuesday, May 25, 2021 | Africa Day | Zimbabwe |
| Wednesday, May 26, 2021 | National Sorry Day | Australia |
| Wednesday, May 26, 2021 | Buddha Purnima/Vesak | Bangladesh |
| Wednesday, May 26, 2021 | Buddha's Parinirvana | Bhutan |
| Wednesday, May 26, 2021 | Independence Day | Georgia |
| Wednesday, May 26, 2021 | Waisak Day (Buddha's Anniversary) | Indonesia |
| Wednesday, May 26, 2021 | Buddha Purnima | India |
| Wednesday, May 26, 2021 | Vesak Full Moon Poya Day | Sri Lanka |
| Wednesday, May 26, 2021 | Great Buddha Day | Mongolia |
| Wednesday, May 26, 2021 | Wesak Day | Malaysia |
| Wednesday, May 26, 2021 | Buddha Jayanti | Nepal |
| Wednesday, May 26, 2021 | Ubhauli Parva | Nepal |
| Wednesday, May 26, 2021 | Buddha Purnima | Pakistan |
| Wednesday, May 26, 2021 | Mother's Day | Poland |
| Wednesday, May 26, 2021 | Vesak Day | Singapore |
| Wednesday, May 26, 2021 | Visakha Bucha | Thailand |
| Wednesday, May 26, 2021 | Day of Vesak | United States |
| Wednesday, May 26, 2021 | Vesak | Vietnam |
| Thursday, May 27, 2021 | Mother's Day | Bolivia |
| Thursday, May 27, 2021 | Abolition Day | Guadeloupe |
| Thursday, May 27, 2021 | Day after Vesak Full Moon Poya Day | Sri Lanka |
| Thursday, May 27, 2021 | Children's Day | Nigeria |
| Friday, May 28, 2021 | Republic Day | Armenia |
| Friday, May 28, 2021 | Bermuda Day | Bermuda |
| Friday, May 28, 2021 | Derg Downfall Day | Ethiopia |
| Friday, May 28, 2021 | Abolition Day | Saint Martin |
| Saturday, May 29, 2021 | Ganatantra Diwas | Nepal |
| Saturday, May 29, 2021 | International Day of United Nations Peacekeepers | United States |
| Sunday, May 30, 2021 | Anguilla Day | Anguilla |
| Sunday, May 30, 2021 | Trinity Sunday | Australia |
| Sunday, May 30, 2021 | Trinity | Czechia |
| Sunday, May 30, 2021 | Mother's Day | Dominican Republic |
| Sunday, May 30, 2021 | Statehood Day | Croatia |
| Sunday, May 30, 2021 | Mother's Day | Haiti |
| Sunday, May 30, 2021 | Dniester Day | Moldova |
| Sunday, May 30, 2021 | Mother's Day | Mauritius |
| Sunday, May 30, 2021 | Harvest Festival | Malaysia |
| Sunday, May 30, 2021 | Mother's Day | Nicaragua |
| Sunday, May 30, 2021 | Indian Arrival Day | Trinidad and Tobago |
| Sunday, May 30, 2021 | Kyiv Day | Ukraine |
| Sunday, May 30, 2021 | Trinity Sunday | United Kingdom |
| Monday, May 31, 2021 | Day off for Anguilla Day | Anguilla |
| Monday, May 31, 2021 | Memorial Day | American Samoa |
| Monday, May 31, 2021 | Reconciliation Day | Australia |
| Monday, May 31, 2021 | Royal Brunei Armed Forces Day | Brunei |
| Monday, May 31, 2021 | Day of Castile-La Mancha | Spain |
| Monday, May 31, 2021 | Spring Bank Holiday | Guernsey |
| Monday, May 31, 2021 | Memorial Day | Guam |
| Monday, May 31, 2021 | Late May Bank Holiday | Isle of Man |
| Monday, May 31, 2021 | Spring Bank Holiday | Jersey |
| Monday, May 31, 2021 | Memorial Day | Northern Mariana Islands |
| Monday, May 31, 2021 | Harvest Festival observed | Malaysia |
| Monday, May 31, 2021 | Second Day of Harvest Festival | Malaysia |
| Monday, May 31, 2021 | Memorial Day | Puerto Rico |
| Monday, May 31, 2021 | JAGS McCartney Day | Turks and Caicos Islands |
| Monday, May 31, 2021 | Indian Arrival Day observed | Trinidad and Tobago |
| Monday, May 31, 2021 | Spring Bank Holiday | United Kingdom |
| Monday, May 31, 2021 | World No Tobacco Day | United States |
| Monday, May 31, 2021 | Memorial Day | United States |
| Monday, May 31, 2021 | Jefferson Davis' Birthday | United States |
| Monday, May 31, 2021 | Memorial Day | US Virgin Islands |