| Date | Country | Holiday name |
|---|---|---|
| 2021-04-01 |  Argentina | Maundy Thursday |
| 2021-04-01 |  Colombia | Maundy Thursday |
| 2021-04-01 |  Costa Rica | Maundy Thursday |
| 2021-04-01 |  Cyprus | Cyprus National Day |
| 2021-04-01 |  Denmark | Maundy Thursday |
| 2021-04-01 |  Ecuador | Maundy Thursday |
| 2021-04-01 |  Spain | Maundy Thursday |
| 2021-04-01 |  Faroe Islands | Maundy Thursday |
| 2021-04-01 |  Greenland | Maundy Thursday |
| 2021-04-01 |  Guatemala | Maundy Thursday |
| 2021-04-01 |  Honduras | Maundy Thursday |
| 2021-04-01 | Canary Islands | Maundy Thursday |
| 2021-04-01 |  Iran | Islamic Republic Day |
| 2021-04-01 |  Iceland | Maundy Thursday |
| 2021-04-01 |  Nicaragua | Maundy Thursday |
| 2021-04-01 |  Norway | Maundy Thursday |
| 2021-04-01 |  Peru | Maundy Thursday |
| 2021-04-01 |  Philippines | Maundy Thursday |
| 2021-04-01 |  Paraguay | Maundy Thursday |
| 2021-04-01 |  Svalbard & Jan Mayen | Maundy Thursday |
| 2021-04-01 |  San Marino | Inauguration Ceremony |
| 2021-04-01 |  El Salvador | Maundy Thursday |
| 2021-04-01 |  Uruguay | Maundy Thursday |
| 2021-04-01 |  Venezuela | Maundy Thursday |
| 2021-04-01 |  U.S. Virgin Islands | Maundy Thursday |
| 2021-04-01 |  New Zealand | April Fools |
| 2021-04-01 |  Norfolk Island | Maundy Thursday |
| 2021-04-01 |  United Kingdom | Maundy Thursday |
| 2021-04-01 |  India | Maundy Thursday |
| 2021-04-01 |  Australia | Maundy Thursday |
| 2021-04-01 |  Norway | Maundy Thursday |
| 2021-04-02 |  Andorra | Good Friday |
| 2021-04-02 |  Antigua & Barbuda | Good Friday |
| 2021-04-02 |  Anguilla | Good Friday |
| 2021-04-02 |  Angola | Good Friday |
| 2021-04-02 | Argentina | Day of the veterans and the fallen in Malvinas War |
| 2021-04-02 | Argentina | Good Friday |
| 2021-04-02 |  Australia | Good Friday |
| 2021-04-02 |  Aruba | Good Friday |
| 2021-04-02 |  Ã…land Islands | Good Friday |
| 2021-04-02 |  Barbados | Good Friday |
| 2021-04-02 |  Bermuda | Good Friday |
| 2021-04-02 |  Bolivia | Good Friday |
| 2021-04-02 |  Caribbean Netherlands | Good Friday |
| 2021-04-02 |  Brazil | Good Friday |
| 2021-04-02 |  Bahamas | Good Friday |
| 2021-04-02 |  Botswana | Good Friday |
| 2021-04-02 |  Belize | Good Friday |
| 2021-04-02 |  Canada | Good Friday |
| 2021-04-02 |  Switzerland | Good Friday |
| 2021-04-02 |  Cook Islands | Good Friday |
| 2021-04-02 |  Chile | Good Friday |
| 2021-04-02 |  Cameroon | Good Friday |
| 2021-04-02 | Colombia | Good Friday |
| 2021-04-02 | Costa Rica | Good Friday |
| 2021-04-02 |  Cuba | Good Friday |
| 2021-04-02 |  Cape Verde | Good Friday |
| 2021-04-02 |  Curaçao | Good Friday |
| 2021-04-02 |  Christmas Island | Good Friday |
| 2021-04-02 |  Czech Republic | Good Friday |
| 2021-04-02 |  Germany | Good Friday |
| 2021-04-02 | Denmark | Good Friday |
| 2021-04-02 |  Dominica | Good Friday |
| 2021-04-02 |  Dominican Republic | Good Friday |
| 2021-04-02 | Ecuador | Good Friday |
| 2021-04-02 |  Estonia | Good Friday |
| 2021-04-02 | Spain | Good Friday |
| 2021-04-02 |  Finland | Good Friday |
| 2021-04-02 |  Fiji | Good Friday |
| 2021-04-02 | Faroe Islands | Good Friday |
| 2021-04-02 |  United Kingdom | Good Friday |
| 2021-04-02 |  Grenada | Good Friday |
| 2021-04-02 |  Guernsey | Good Friday |
| 2021-04-02 |  Ghana | Good Friday |
| 2021-04-02 |  Gibraltar | Good Friday |
| 2021-04-02 | Greenland | Good Friday |
| 2021-04-02 |  The Gambia | Good Friday |
| 2021-04-02 |  Guadeloupe | Good Friday |
| 2021-04-02 |  Republic of Equatorial Guinea | Good Friday |
| 2021-04-02 | Guatemala | Good Friday |
| 2021-04-02 |  Guyana | Good Friday |
| 2021-04-02 |  Hong Kong | Good Friday |
| 2021-04-02 | Honduras | Good Friday |
| 2021-04-02 |  Haiti | Good Friday |
| 2021-04-02 |  Hungary | Good Friday |
| 2021-04-02 | Canary Islands | Good Friday |
| 2021-04-02 |  Indonesia | Good Friday |
| 2021-04-02 |  Isle of Man | Good Friday |
| 2021-04-02 | Iran | Sizdah Bedar |
| 2021-04-02 | Iceland | Good Friday |
| 2021-04-02 |  Jersey | Good Friday |
| 2021-04-02 |  Jamaica | Good Friday |
| 2021-04-02 |  Kenya | Good Friday |
| 2021-04-02 |  St. Kitts & Nevis | Good Friday |
| 2021-04-02 |  Cayman Islands | Good Friday |
| 2021-04-02 |  St. Lucia | Good Friday |
| 2021-04-02 |  Lichtenstein | Good Friday |
| 2021-04-02 |  Lesotho | Good Friday |
| 2021-04-02 |  Latvia | Good Friday |
| 2021-04-02 |  Montenegro | Good Friday |
| 2021-04-02 |  Martinique | Good Friday |
| 2021-04-02 |  Montserrat | Good Friday |
| 2021-04-02 |  Malta | Good Friday |
| 2021-04-02 |  Malawi | Good Friday |
| 2021-04-02 |  Malaysia | Good Friday |
| 2021-04-02 |  Namibia | Good Friday |
| 2021-04-02 |  Nigeria | Good Friday |
| 2021-04-02 | Nicaragua | Good Friday |
| 2021-04-02 | Norway | Good Friday |
| 2021-04-02 |  New Zealand | Good Friday |
| 2021-04-02 |  Panama | Good Friday |
| 2021-04-02 | Peru | Good Friday |
| 2021-04-02 | Philippines | Good Friday |
| 2021-04-02 |  Portugal | Good Friday |
| 2021-04-02 | Paraguay | Good Friday |
| 2021-04-02 |  Rwanda | Good Friday |
| 2021-04-02 |  Seychelles | Good Friday |
| 2021-04-02 |  Sweden | Good Friday |
| 2021-04-02 |  Singapore | Good Friday |
| 2021-04-02 |  St. Helena | Good Friday |
| 2021-04-02 | Svalbard & Jan Mayen | Good Friday |
| 2021-04-02 |  Slovakia | Good Friday |
| 2021-04-02 |  Sierra Leone | Good Friday |
| 2021-04-02 |  Suriname | Good Friday |
| 2021-04-02 | El Salvador | Good Friday |
| 2021-04-02 |  Sint Maarten | Good Friday |
| 2021-04-02 |  Swaziland | Good Friday |
| 2021-04-02 |  Turks & Caicos Islands | Good Friday |
| 2021-04-02 |  Tonga | Good Friday |
| 2021-04-02 |  Trinidad & Tobago | Good Friday |
| 2021-04-02 |  Tanzania | Good Friday |
| 2021-04-02 |  Uganda | Good Friday |
| 2021-04-02 | Uruguay | Good Friday |
| 2021-04-02 |  St. Vincent & Grenadines | Good Friday |
| 2021-04-02 | Venezuela | Good Friday |
| 2021-04-02 |  British Virgin Islands | Good Friday |
| 2021-04-02 | U.S. Virgin Islands | Good Friday |
| 2021-04-02 |  Vanuatu | Good Friday |
| 2021-04-02 |  South Africa | Good Friday |
| 2021-04-02 |  Zambia | Good Friday |
| 2021-04-02 |  Zimbabwe | Good Friday |
| 2021-04-02 |  Timor Leste | Holy Friday |
| 2021-04-02 |  Pakistan | Good Friday |
| 2021-04-02 |  Samoa | Good Friday |
| 2021-04-02 |  Tuvalu | Good Friday |
| 2021-04-02 | New Zealand | Good Friday |
| 2021-04-02 |  Solomon Islands | Good Friday |
| 2021-04-02 |  Papua New Guinea | Good Friday |
| 2021-04-02 |  French Polynesia | Good Friday |
| 2021-04-02 |  Nauru | Good Friday |
| 2021-04-02 | Norfolk Island | Good Friday |
| 2021-04-02 |  Northern Mariana Islands | Good Friday |
| 2021-04-02 |  Macau | Good Friday |
| 2021-04-02 |  Marshall Islands | Good Friday |
| 2021-04-02 |  Sri Lanka | Good Friday |
| 2021-04-02 |  Lebanon | Good Friday |
| 2021-04-02 |  Kiribati | Good Friday |
| 2021-04-02 | United Kingdom | Good Friday |
| 2021-04-02 | India | Good Friday |
| 2021-04-02 | Australia | Good Friday |
| 2021-04-02 |  Micronesia | Good Friday |
| 2021-04-02 |  Falkland Islands | Good Friday |
| 2021-04-02 | Norway | Good Friday |
| 2021-04-02 |  Netherlands | Good Friday |
| 2021-04-02 |  United States of America | Good Friday (KY) |
| 2021-04-03 | Australia | Easter Saturday |
| 2021-04-03 | Botswana | Easter Saturday |
| 2021-04-03 | Belize | Easter Saturday |
| 2021-04-03 |  China | Qingming Festival |
| 2021-04-03 | Fiji | Easter Saturday |
| 2021-04-03 |  Guinea | National Holiday |
| 2021-04-03 | Guatemala | Easter Saturday |
| 2021-04-03 | Hong Kong | Easter Saturday |
| 2021-04-03 | Seychelles | Easter Saturday |
| 2021-04-03 | El Salvador | Easter Saturday |
| 2021-04-03 | Samoa | Day After Good Friday |
| 2021-04-03 | Tuvalu | Holy Saturday |
| 2021-04-03 | New Zealand | Holy Saturday |
| 2021-04-03 | Solomon Islands | Holy Saturday |
| 2021-04-03 | Papua New Guinea | Holy Saturday |
| 2021-04-03 | Macau | Holy Saturday |
| 2021-04-03 | United Kingdom | Holy Saturday |
| 2021-04-03 | Australia | Holy Saturday |
| 2021-04-03 | Norway | Holy Saturday |
| 2021-04-03 |  Israel | Mimouna, Seventh day of Passover |
| 2021-04-03 | Samoa | Daylight Saving Time ends |
| 2021-04-03 | Norfolk Island | Daylight Saving Time ends |
| 2021-04-03 | Australia | Daylight Saving Time ends |
| 2021-04-04 | Andorra | Easter Sunday |
| 2021-04-04 |  Albania | Catholic Easter |
| 2021-04-04 | Angola | Peace Day |
| 2021-04-04 |  Austria | Easter Sunday |
| 2021-04-04 | Australia | Easter Sunday |
| 2021-04-04 |  Bosnia and Herzegovina | Easter Sunday |
| 2021-04-04 |  Burkina Faso | Easter Sunday |
| 2021-04-04 | Canada | Easter Sunday |
| 2021-04-04 | Switzerland | Easter Sunday |
| 2021-04-04 | Chile | Easter Sunday |
| 2021-04-04 | China | Qingming Festival |
| 2021-04-04 | Colombia | Easter Sunday |
| 2021-04-04 | Denmark | Easter Sunday |
| 2021-04-04 | Estonia | Easter Sunday |
| 2021-04-04 | Finland | Easter Sunday |
| 2021-04-04 | Faroe Islands | Easter Sunday |
| 2021-04-04 | Greenland | Easter Sunday |
| 2021-04-04 | Hong Kong | Easter Sunday |
| 2021-04-04 | Hong Kong | Qingming Festival |
| 2021-04-04 |  Croatia | Easter Sunday |
| 2021-04-04 | Haiti | Easter Sunday |
| 2021-04-04 | Hungary | Easter Sunday |
| 2021-04-04 |  Ireland | Easter Sunday |
| 2021-04-04 | Iceland | Easter Sunday |
| 2021-04-04 |  Italia | Easter Sunday |
| 2021-04-04 | Kenya | Easter Sunday |
| 2021-04-04 |  Lithuania | Easter Sunday |
| 2021-04-04 | Latvia | Easter Sunday |
| 2021-04-04 | Montenegro | Easter Sunday |
| 2021-04-04 |  Madagascar | Easter Sunday |
| 2021-04-04 |  Netherlands | Easter Sunday |
| 2021-04-04 | Norway | Easter Sunday |
| 2021-04-04 | Peru | Easter Sunday |
| 2021-04-04 | Philippines | Easter Sunday |
| 2021-04-04 |  Poland | Easter Sunday |
| 2021-04-04 | Portugal | Easter Sunday |
| 2021-04-04 | Seychelles | Easter Sunday |
| 2021-04-04 |  Slovenia | Easter Sunday |
| 2021-04-04 | Svalbard & Jan Mayen | Easter Sunday |
| 2021-04-04 | San Marino | Easter Sunday |
| 2021-04-04 |  Senegal | National Holiday |
| 2021-04-04 | Sint Maarten | Easter Sunday |
| 2021-04-04 | Trinidad & Tobago | Easter Sunday |
| 2021-04-04 |  Taiwan | Children's Day |
| 2021-04-04 | Taiwan | Tomb Sweeping Day |
| 2021-04-04 | Uganda | Easter Sunday |
| 2021-04-04 | Venezuela | Easter Sunday |
| 2021-04-04 |  Kosovo | Easter Sunday |
| 2021-04-04 | Pakistan | Easter Sunday |
| 2021-04-04 | Tuvalu | Easter Sunday |
| 2021-04-04 | New Zealand | Easter Sunday |
| 2021-04-04 |  Syria | Easter Sunday |
| 2021-04-04 | Solomon Islands | Easter Sunday |
| 2021-04-04 | Papua New Guinea | Easter Sunday |
| 2021-04-04 | Norfolk Island | Easter Sunday |
| 2021-04-04 | Macau | Cheng Ming Festival |
| 2021-04-04 | Sri Lanka | Easter Sunday |
| 2021-04-04 | Lebanon | Easter Sunday |
| 2021-04-04 | United Kingdom | Last day of Passover |
| 2021-04-04 | United Kingdom | Easter Sunday |
| 2021-04-04 | India | Easter Day |
| 2021-04-04 | Australia | Last day of Passover |
| 2021-04-04 | Australia | Easter Sunday |
| 2021-04-04 | Norway | Easter Sunday |
| 2021-04-04 | Netherlands | Easter Sunday |
| 2021-04-05 | Andorra | Easter Monday |
| 2021-04-05 | Antigua & Barbuda | Easter Monday |
| 2021-04-05 | Anguilla | Easter Monday |
| 2021-04-05 | Albania | Catholic Easter |
| 2021-04-05 | Austria | Easter Monday |
| 2021-04-05 | Australia | Easter Monday |
| 2021-04-05 | Aruba | Easter Monday |
| 2021-04-05 | Ã…land Islands | Easter Monday |
| 2021-04-05 | Bosnia and Herzegovina | Easter Monday |
| 2021-04-05 | Barbados | Easter Monday |
| 2021-04-05 |  Belgium | Easter Monday |
| 2021-04-05 | Burkina Faso | Easter Monday |
| 2021-04-05 |  Benin | Easter Monday |
| 2021-04-05 |  St. Barths | Easter Monday |
| 2021-04-05 | Caribbean Netherlands | Easter Monday |
| 2021-04-05 | Bahamas | Easter Monday |
| 2021-04-05 | Botswana | Easter Monday |
| 2021-04-05 | Belize | Easter Monday |
| 2021-04-05 | Canada | Easter Monday |
| 2021-04-05 |  Cocos (Keeling) Islands | Easter Monday |
| 2021-04-05 |  Central African Republic | Easter Monday |
| 2021-04-05 |  Republic of the Congo | Easter Monday |
| 2021-04-05 | Switzerland | Easter Monday |
| 2021-04-05 |  Republic of Côte d'Ivoire | Easter Monday |
| 2021-04-05 | Cook Islands | Easter Monday |
| 2021-04-05 | China | Qingming Festival |
| 2021-04-05 | Curaçao | Easter Monday |
| 2021-04-05 | Czech Republic | Easter Monday |
| 2021-04-05 | Germany | Easter Monday |
| 2021-04-05 | Denmark | Easter Monday |
| 2021-04-05 | Dominica | Easter Monday |
| 2021-04-05 | Spain | Easter Monday |
| 2021-04-05 | Finland | Easter Monday |
| 2021-04-05 | Fiji | Easter Monday |
| 2021-04-05 | Faroe Islands | Easter Monday |
| 2021-04-05 |  France | Easter Monday |
| 2021-04-05 |  Gabon | Easter Monday |
| 2021-04-05 | United Kingdom | Easter Monday |
| 2021-04-05 | Grenada | Easter Monday |
| 2021-04-05 |  French Guiana | Easter Monday |
| 2021-04-05 | Guernsey | Easter Monday |
| 2021-04-05 | Ghana | Easter Monday |
| 2021-04-05 | Gibraltar | Easter Monday |
| 2021-04-05 | Greenland | Easter Monday |
| 2021-04-05 | The Gambia | Easter Monday |
| 2021-04-05 | Guinea | Easter Monday |
| 2021-04-05 | Guadeloupe | Easter Monday |
| 2021-04-05 | Guyana | Easter Monday |
| 2021-04-05 | Hong Kong | Qingming Festival |
| 2021-04-05 | Croatia | Easter Monday |
| 2021-04-05 | Hungary | Easter Monday |
| 2021-04-05 | Ireland | Easter Monday |
| 2021-04-05 | Isle of Man | Easter Monday |
| 2021-04-05 | Iceland | Easter Monday |
| 2021-04-05 | Italia | Easter Monday |
| 2021-04-05 | Jersey | Easter Monday |
| 2021-04-05 | Jamaica | Easter Monday |
| 2021-04-05 | Kenya | Easter Monday |
| 2021-04-05 | St. Kitts & Nevis | Easter Monday |
| 2021-04-05 | Cayman Islands | Easter Monday |
| 2021-04-05 | St. Lucia | Easter Monday |
| 2021-04-05 | Lichtenstein | Easter Monday |
| 2021-04-05 | Lesotho | Easter Monday |
| 2021-04-05 | Lithuania | Easter Monday |
| 2021-04-05 |  Luxembourg | Easter Monday |
| 2021-04-05 | Latvia | Easter Monday |
| 2021-04-05 |  Monaco | Easter Monday |
| 2021-04-05 | Montenegro | Easter Sunday |
| 2021-04-05 |  St. Martin | Easter Monday |
| 2021-04-05 | Madagascar | Easter Monday |
| 2021-04-05 |  Republic of Mali | Easter Monday |
| 2021-04-05 | Martinique | Easter Monday |
| 2021-04-05 | Montserrat | Easter Monday |
| 2021-04-05 | Malawi | Easter Monday |
| 2021-04-05 | Namibia | Easter Monday |
| 2021-04-05 |  New Caledonia | Easter Monday |
| 2021-04-05 |  Republic of the Niger | Easter Monday |
| 2021-04-05 | Nigeria | Easter Monday |
| 2021-04-05 | Netherlands | Easter Monday |
| 2021-04-05 | Norway | Easter Monday |
| 2021-04-05 | New Zealand | Easter Monday |
| 2021-04-05 | Poland | Easter Monday |
| 2021-04-05 |  St. Pierre & Miquelon | Easter Monday |
| 2021-04-05 |  Réunion | Easter Monday |
| 2021-04-05 | Rwanda | Easter Monday |
| 2021-04-05 | Seychelles | Easter Monday |
| 2021-04-05 | Sweden | Easter Monday |
| 2021-04-05 | St. Helena | Easter Monday |
| 2021-04-05 | Slovenia | Easter Monday |
| 2021-04-05 | Svalbard & Jan Mayen | Easter Monday |
| 2021-04-05 | Slovakia | Easter Monday |
| 2021-04-05 | Sierra Leone | Easter Monday |
| 2021-04-05 | San Marino | Easter Monday |
| 2021-04-05 | Senegal | Easter Monday |
| 2021-04-05 | Suriname | Easter Monday |
| 2021-04-05 | Sint Maarten | Easter Monday |
| 2021-04-05 | Swaziland | Easter Monday |
| 2021-04-05 | Turks & Caicos Islands | Easter Monday |
| 2021-04-05 |  Chad | Easter Monday |
| 2021-04-05 |  Togolese Republic | Easter Monday |
| 2021-04-05 | Tonga | Easter Monday |
| 2021-04-05 | Taiwan | Children's Day (substitute day) |
| 2021-04-05 | Taiwan | Tomb Sweeping Day (substitute day) |
| 2021-04-05 | Tanzania | Easter Monday |
| 2021-04-05 | Uganda | Easter Monday |
| 2021-04-05 |  Vatican City | Easter Monday |
| 2021-04-05 | St. Vincent & Grenadines | Easter Monday |
| 2021-04-05 | British Virgin Islands | Easter Monday |
| 2021-04-05 | U.S. Virgin Islands | Easter Monday |
| 2021-04-05 | Vanuatu | Easter Monday |
| 2021-04-05 |  Mayotte | Easter Monday |
| 2021-04-05 | South Africa | Family Day |
| 2021-04-05 | Zambia | Easter Monday |
| 2021-04-05 | Zimbabwe | Easter Monday |
| 2021-04-05 | Pakistan | Easter Monday |
| 2021-04-05 | Samoa | Easter Monday |
| 2021-04-05 |  Wallis and Futuna | Easter Monday |
| 2021-04-05 | Tuvalu | Easter Monday |
| 2021-04-05 | New Zealand | Easter Monday |
| 2021-04-05 | Solomon Islands | Easter Monday |
| 2021-04-05 | Papua New Guinea | Easter Monday |
| 2021-04-05 | French Polynesia | Easter Monday |
| 2021-04-05 | Nauru | Easter Monday |
| 2021-04-05 | Norfolk Island | Easter Monday |
| 2021-04-05 | Macau | Holy Saturday Holiday |
| 2021-04-05 | Lebanon | Easter Monday |
| 2021-04-05 | Kiribati | Easter Monday |
| 2021-04-05 | Australia | Easter Monday |
| 2021-04-05 | Norway | Easter Monday |
| 2021-04-05 | Netherlands | Easter Monday |
| 2021-04-06 |  Burundi | Ntaryamira Day |
| 2021-04-06 | Cocos (Keeling) Islands | Self Determination Day |
| 2021-04-06 | Hong Kong | Easter Monday |
| 2021-04-06 | New Zealand | Provincial anniversary day |
| 2021-04-06 |  Thailand | Chakri Memorial Day |
| 2021-04-06 | Nauru | Easter Tuesday |
| 2021-04-06 | Macau | Cheng Ming Holiday |
| 2021-04-07 |  Mozambique | Women’s Day |
| 2021-04-07 | Rwanda | Genocide Memorial Day |
| 2021-04-07 | Tanzania | Karume Day |
| 2021-04-07 |  Turkmenistan | World Health Day |
| 2021-04-07 |  Mongolia | Health Day |
| 2021-04-07 |  Kyrgyzstan | April People's Revolution Day |
| 2021-04-07 |  Iraq | Yazidi New Year |
| 2021-04-08 | Switzerland | Näfelser Fahrt |
| 2021-04-08 | Samoa | Day Before Polling Day |
| 2021-04-08 | United Kingdom | Yom HaShoah |
| 2021-04-08 | Australia | Yom HaShoah |
| 2021-04-09 |  Georgia | National Unity Day |
| 2021-04-09 |  Liberia | Fast and Prayer Day |
| 2021-04-09 | Philippines | Day of Valor |
| 2021-04-09 |  Tunisia | عيد الشهداء |
| 2021-04-09 | Kosovo | Constitution Day |
| 2021-04-09 | Samoa | Polling Day |
| 2021-04-09 | Kiribati | National Health Day |
| 2021-04-09 | Iraq | Baghdad Liberation Day |
| 2021-04-09 | Iraq | Fall of the Defunct Dictatorial Regime and the Liberation of Iraq Day |
| 2021-04-11 | Costa Rica | Gesta Heroica de Juan SantamarÃa |
| 2021-04-11 |  Nepal | Godhe Yatra |
| 2021-04-11 |  Maldives | Government Holiday |
| 2021-04-12 | Maldives | Government Holiday |
| 2021-04-13 | Thailand | Songkran Festival |
| 2021-04-13 | Maldives | Ramadan Start |
| 2021-04-13 |  Mauritius | Ougadi |
| 2021-04-13 |  Myanmar | Maha Thingyan (Water Festival) |
| 2021-04-13 | Sri Lanka | Sinhala and Tamil New Year's Eve |
| 2021-04-13 | United Kingdom | Ramadan Start |
| 2021-04-13 | India | Chaitra Sukhladi |
| 2021-04-13 | India | Ugadi |
| 2021-04-13 | India | Gudi Padwa |
| 2021-04-13 | Australia | Ramadan Start |
| 2021-04-13 |  Afghanistan | First Day of Ramadan |
| 2021-04-13 |  United Arab Emirates | First day of Ramadan |
| 2021-04-13 |  Brunei | First day of Ramadan |
| 2021-04-13 |  Ethiopia | First day of Ramadan |
| 2021-04-13 | Malaysia | First day of Ramadan |
| 2021-04-14 |  People's Republic of Bangladesh | Bengali New Year's Day |
| 2021-04-14 | Honduras | DÃa de las Américas |
| 2021-04-14 | Cayman Islands | General Election Day |
| 2021-04-14 | Thailand | Songkran Festival |
| 2021-04-14 |  Cambodia | Khmer New Year's Day |
| 2021-04-14 |  Laos | Lao New Year's Day |
| 2021-04-14 | Pakistan | Baisakhi |
| 2021-04-14 | Pakistan | Ramadan Start |
| 2021-04-14 | Nepal | Nepali New Year |
| 2021-04-14 | Myanmar | Maha Thingyan (Water Festival) |
| 2021-04-14 | Sri Lanka | Sinhala and Tamil New Year's Day |
| 2021-04-14 | India | Vaisakhi |
| 2021-04-14 | India | Mesadi |
| 2021-04-14 | India | Ambedkar Jayanti |
| 2021-04-15 | Bolivia | Tarija Day |
| 2021-04-15 | Malaysia | Declaration of Malacca City as Historical City |
| 2021-04-15 | Thailand | Songkran Festival |
| 2021-04-15 | Cambodia | Khmer New Year's Day |
| 2021-04-15 | Laos | Lao New Year's Day |
| 2021-04-15 | Myanmar | Maha Thingyan (Water Festival) |
| 2021-04-15 |  North Korea | Birth Date of Kim Il Sung |
| 2021-04-15 | United Kingdom | Yom HaAtzmaut |
| 2021-04-15 | India | Bahag Bihu/Vaisakhadi |
| 2021-04-15 | Australia | Yom HaAtzmaut |
| 2021-04-15 | Israel | Independence Day (Yom HaAtzmaut) |
| 2021-04-16 |  Puerto Rico | Birthday of José de Diego |
| 2021-04-16 | United States of America | Emancipation Day |
| 2021-04-16 | Cambodia | Khmer New Year's Day |
| 2021-04-16 | Laos | Lao New Year's Day |
| 2021-04-16 | Myanmar | Maha Thingyan (Water Festival) |
| 2021-04-17 |  American Samoa | American Samoa Flag Day |
| 2021-04-17 | Gabon | Women's Day |
| 2021-04-17 | Turkmenistan | Migration Workers Day |
| 2021-04-17 | Syria | Evacuation Day |
| 2021-04-17 | Myanmar | Maha Thingyan (Water Festival) |
| 2021-04-18 | Zimbabwe | Independence Day |
| 2021-04-18 | Myanmar | Maha Thingyan (Water Festival) |
| 2021-04-19 | St. Helena | Queen's Birthday |
| 2021-04-19 | Swaziland | Birthday of King Mswati III |
| 2021-04-19 | United States of America | Patriots' Day |
| 2021-04-19 | Venezuela | Declaration of Independence |
| 2021-04-19 | Myanmar | Maha Thingyan (Water Festival) |
| 2021-04-21 | Brazil | Tiradentes' Day |
| 2021-04-21 | Brazil | Fundação de BrasÃlia (DF) |
| 2021-04-21 | Brazil | Data magna do estado (MG) |
| 2021-04-21 |  Vietnam | Hung Kings Commemorations |
| 2021-04-21 | Pakistan | Ridván |
| 2021-04-21 | India | Rama Navami |
| 2021-04-21 | Falkland Islands | Queen Elizabeth II's Birthday |
| 2021-04-22 | Iceland | First Day of Summer |
| 2021-04-22 | United Kingdom | Stephen Lawrence Day |
| 2021-04-22 |  Bhutan | Death Anniversary of Zhabdrung (Zhabdrung Kuchoe) |
| 2021-04-23 | Brazil | Dia de São Jorge |
| 2021-04-23 | Spain | DÃa de Aragón (AR) |
| 2021-04-23 | Spain | Fiesta de Castilla y León (CL) |
| 2021-04-23 |  Turkey | National Sovereignty and Children's Day |
| 2021-04-23 | Vatican City | Saint George - Name day of the Holy Father |
| 2021-04-23 | United Kingdom | St. George's Day |
| 2021-04-23 | United Kingdom | Shakespeare Day |
| 2021-04-24 |  Armenia | Mother's Day |
| 2021-04-24 | Faroe Islands | Flag Day |
| 2021-04-24 | Republic of the Niger | Concord Day |
| 2021-04-24 | Nepal | Loktantra Diwas |
| 2021-04-25 | Australia | Anzac Day |
| 2021-04-25 | Cocos (Keeling) Islands | Anzac Day |
| 2021-04-25 | Cook Islands | Anzac Day |
| 2021-04-25 | Christmas Island | Anzac Day |
| 2021-04-25 |  Egypt | Sinai Liberation Day |
| 2021-04-25 | Italia | Liberation Day |
| 2021-04-25 | New Zealand | ANZAC Day |
| 2021-04-25 | Portugal | Liberty Day |
| 2021-04-25 | Swaziland | National Flag Day |
| 2021-04-25 | Tonga | ANZAC Day |
| 2021-04-25 | Turkmenistan | Turkmen Racing Horse Festival |
| 2021-04-25 | New Zealand | ANZAC Day |
| 2021-04-25 | North Korea | Chosun People's Army Foundation Day |
| 2021-04-25 | India | Mahavir Jayanti |
| 2021-04-25 | Australia | ANZAC Day |
| 2021-04-26 | Australia | Anzac Day |
| 2021-04-26 | Australia | Anzac Day (substitute day) (WA) |
| 2021-04-26 | Malaysia | Sultan of Terengganu's Birthday |
| 2021-04-26 | New Zealand | ANZAC Day (substitute day) |
| 2021-04-26 | Swaziland | National Flag Day (substitute day) |
| 2021-04-26 | Tanzania | Union Day |
| 2021-04-26 | United States of America | Confederate Memorial Day (MS) |
| 2021-04-26 | United States of America | State Holiday (GA) |
| 2021-04-26 | Cambodia | Visaka Bochea Day |
| 2021-04-26 | New Zealand | Day off for ANZAC Day |
| 2021-04-26 | Mongolia | Intellectual Property Day |
| 2021-04-26 | Sri Lanka | Bak Full Moon Poya Day |
| 2021-04-27 | Aruba | Kings Day |
| 2021-04-27 | Caribbean Netherlands | Kings Day |
| 2021-04-27 | Curaçao | Kings Day |
| 2021-04-27 | France | Abolition of Slavery |
| 2021-04-27 | Netherlands | King's Day |
| 2021-04-27 | Slovenia | Day of Uprising Against Occupation |
| 2021-04-27 | Sierra Leone | Independence Day |
| 2021-04-27 | Sint Maarten | King's Day |
| 2021-04-27 | Togolese Republic | Independence Day |
| 2021-04-27 | Mayotte | Abolition of Slavery |
| 2021-04-27 | South Africa | Freedom Day |
| 2021-04-27 | Netherlands | King's Birthday |
| 2021-04-28 | Barbados | National Heroes Day |
| 2021-04-28 | Gibraltar | Workers Memorial Day |
| 2021-04-28 | Wallis and Futuna | St. Pierre Chanel Day |
| 2021-04-28 | Afghanistan | Afghan Victory Day |
| 2021-04-29 |  Japan | Showa Day |
| 2021-04-29 | Brunei | Nuzul Al-Quran |
| 2021-04-29 | Malaysia | Day of Nuzul Al-Quran |
| 2021-04-30 |  Bulgaria | Good Friday |
| 2021-04-30 | Caribbean Netherlands | Rincon Day |
| 2021-04-30 | Cyprus | Good Friday |
| 2021-04-30 | Denmark | Prayer Day |
| 2021-04-30 |  Eritrea | Orthodox Good Friday |
| 2021-04-30 | Ethiopia | Good Friday |
| 2021-04-30 | Faroe Islands | Great Prayer Day |
| 2021-04-30 | Georgia | Good Friday |
| 2021-04-30 | Greenland | Prayer Day |
| 2021-04-30 |  Greece | Good Friday |
| 2021-04-30 | Montenegro | Good Friday |
| 2021-04-30 |  Romania | Good Friday |
| 2021-04-30 |  Serbia | Orthodox Good Friday |
| 2021-04-30 |  São Tomé & PrÃncipe | Labour Day (substitute day) |
| 2021-04-30 | Sint Maarten | Carnival |
| 2021-04-30 | United States of America | Arbor Day |
| 2021-04-30 | Vietnam | Day of liberating the South for national reunification |
| 2021-04-30 | Cambodia | Royal Ploughing Ceremony |
| 2021-04-30 | Marshall Islands | Day off for Constitution Day |
| 2021-04-30 | Lebanon | Orthodox Good Friday |
| 2021-04-30 | United Kingdom | Lag B'Omer |
| 2021-04-30 | United Kingdom | Orthodox Good Friday |
| 2021-04-30 | Australia | Lag B'Omer |
| 2021-04-30 | Australia | Orthodox Good Friday |
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