| Date | ISO week | Holiday | Where |
|---|
| Saturday 1 May 2027 | 2027-W17 | Labor Day | Algeria, Andorra, Anguilla, Argentina, Armenia, Aruba, Austria, Bahrain, Belarus, Belgium, Benin, Bolivia, Burkina Faso, Caribbean Netherlands, Central African Republic, Chad, Chile, China, Colombia, Congo, Côte d'Ivoire, Croatia, Curaçao, Cyprus, Czechia, Djibouti, Dominican Republic, DR Congo, Ecuador, Egypt, El Salvador, France, French Guiana, French Polynesia, French Southern Territories, Gabon, Gambia, Germany, Greece, Grenada, Guadeloupe, Guatemala, Guinea, Guyana, Honduras, Hong Kong, Hungary, Iceland, Iraq, Italy, Jordan, Kenya, Kyrgyzstan, Lebanon, Libya, Liechtenstein, Luxembourg, Macau, Madagascar, Malaysia, Mali, Martinique, Mauritania, Mauritius, Mayotte, Mexico, Monaco, Montenegro, Morocco, New Caledonia, Nicaragua, North Macedonia, Norway, Pakistan, Palestine, Panama, Peru, Philippines, Portugal, Réunion, Romania, Rwanda, Senegal, Seychelles, Singapore, Sint Maarten, Slovakia, Slovenia, Somalia, South Korea, Spain, St Barthélemy, St Lucia, St Martin, St Pierre & Miquelon, Suriname, Svalbard & Jan Mayen, Syria, Taiwan, Togo, Tunisia, Wallis & Futuna, Yemen |
| | International Labor Day | Bosnia & Herzegovina, Burundi, Cambodia, Costa Rica, Equatorial Guinea, Indonesia, Laos, Nepal, Niger, Vietnam |
| | Labour Day | Belize, Botswana, Cameroon, Comoros, Ghana, Malawi, Uganda, Vanuatu, Zambia |
| | International Workers' Day | Albania, Cuba, Eritrea, Ethiopia, Lithuania, Mozambique, North Korea, Tanzania |
| | May Day | Åland Islands, Bangladesh, Barbados, Estonia, Finland, Gibraltar, Myanmar, Sweden |
| | Workers' Day | Lesotho, Namibia, Nigeria, Paraguay, San Marino, South Africa, Uruguay, Zimbabwe |
| | Worker's Day | Brazil, Cape Verde, Eswatini, Guinea-Bissau, Malta, São Tomé & Príncipe |
| | International Worker's Day | Angola, Maldives, Sierra Leone, Timor-Leste, Venezuela |
| | Holy Saturday | Bulgaria, Georgia, Serbia |
| | Agriculture and Labor Day | Haiti |
| | Constitution Day | Marshall Islands |
| | Constitutional Assembly Convocation Day | Latvia |
| | Holiday of Spring and Labor | Russia |
| | International Labour Day | South Sudan |
| | International Workers' Solidarity Day | Moldova |
| | Kazakhstan's People Solidarity Holiday | Kazakhstan |
| | Labor and Solidarity Day | Turkey |
| | National Day | Poland |
| | National Labor Day | Thailand |
| | National Workers' Day | St Vincent & Grenadines |
| | Saint Joseph the Worker's Day | Vatican City |
| Sunday 2 May 2027 | 2027-W17 | Easter | Bulgaria, Moldova, Palestine, Romania |
| | Easter Sunday | Cyprus, Ethiopia, Georgia, Serbia |
| | Labor Day | China, Montenegro, Slovenia |
| | Orthodox Easter | Belarus, Eritrea |
| | Birth Anniversary of the 3rd Druk Gyalpo | Bhutan |
| | Coptic Easter | Sudan |
| | International Labor Day | Bosnia & Herzegovina |
| | Julian Easter Sunday | Syria |
| | Martyrs' Day | Lebanon |
| | May Holidays | Kyrgyzstan |
| | Mother's Day | Lithuania |
| | Orthodox Easter Sunday | Albania |
| Monday 3 May 2027 | 2027-W18 | Labor Day | Anguilla, China, Gambia, Montenegro, Montserrat, Rwanda |
| | Easter Monday | Cyprus, Georgia, Greece, North Macedonia, Serbia |
| | Labour Day | Antigua & Barbuda, Dominica, Malawi, St Kitts & Nevis |
| | Easter | Bulgaria, Moldova, Romania |
| | May Day | Gibraltar, Isle of Man, United Kingdom |
| | International Labor Day | Equatorial Guinea, Vietnam |
| | Alternative holiday for Labor Day | South Korea |
| | Constitution Day | Japan |
| | Early May Bank Holiday | Jersey |
| | Emancipation Day | Cayman Islands |
| | Holiday of Spring and Labor | Russia |
| | International Labor Day (in lieu) | Laos |
| | International Worker's Day | Sierra Leone |
| | International Workers' Day | Albania |
| | Kazakhstan's People Solidarity Holiday | Kazakhstan |
| | Labour Day Holiday | Botswana |
| | May Bank Holiday | Ireland |
| | May Day Bank Holiday | Guernsey |
| | May Holidays | Kyrgyzstan |
| | National Day of the Third of May | Poland |
| | National Labor Day (in lieu) | Thailand |
| | Spring Festival | Egypt |
| | Workers' Day | Nigeria |
| Tuesday 4 May 2027 | 2027-W18 | Labor Day | China, Greece, Serbia |
| | Cassinga Day | Namibia |
| | Coronation Day | Thailand |
| | Greenery Day | Japan |
| | Labor Day and International Workers' Solidarity Day | Bulgaria |
| | May Holidays | Kyrgyzstan |
| | Orthodox Easter Sunday | Albania |
| | Restoration of Independence Day | Latvia |
| Wednesday 5 May 2027 | 2027-W18 | Children's Day | Japan, South Korea |
| | Arrival Day | Guyana |
| | Constitution Day | Kyrgyzstan |
| | Ethiopian Patriots' Victory Day | Ethiopia |
| | Senior Citizens Day | Palau |
| Thursday 6 May 2027 | 2027-W18 | Ascension Day | Åland Islands, Aruba, Austria, Belgium, Benin, Botswana, Burkina Faso, Burundi, Cameroon, Caribbean Netherlands, Central African Republic, Congo, Côte d'Ivoire, Curaçao, Denmark, Eswatini, Faroe Islands, Finland, France, French Guiana, French Polynesia, French Southern Territories, Gabon, Germany, Greenland, Guadeloupe, Iceland, Indonesia, Lesotho, Liechtenstein, Luxembourg, Madagascar, Martinique, Mayotte, Monaco, Namibia, Netherlands, New Caledonia, Norway, Réunion, Senegal, Sint Maarten, St Barthélemy, St Martin, St Pierre & Miquelon, Svalbard & Jan Mayen, Sweden, Switzerland, Togo, Vanuatu, Vatican City, Wallis & Futuna |
| | Martyrs' Day | Syria |
| | May Holidays | Kyrgyzstan |
| | Saint George's Day, Day of the Bulgarian Army | Bulgaria |
| Friday 7 May 2027 | 2027-W18 | Defender of the Fatherland Day | Kazakhstan |
| | May Holidays | Kyrgyzstan |
| Saturday 8 May 2027 | 2027-W18 | Victory Day | Czechia, France, French Guiana, French Polynesia, French Southern Territories, Guadeloupe, Martinique, Mayotte, New Caledonia, Réunion, St Barthélemy, St Martin, St Pierre & Miquelon, Wallis & Futuna |
| | Anniversary of the Election of the Holy Father | Vatican City |
| | Day of Victory over Fascism | Slovakia |
| | May Holidays | Kyrgyzstan |
| Sunday 9 May 2027 | 2027-W18 | Victory Day | Belarus, Kazakhstan, Kyrgyzstan, Russia, Tajikistan |
| | Europe Day | Luxembourg, Moldova |
| | Day of Memory and Honor | Uzbekistan |
| | Day of Victory over Fascism | Georgia |
| | Liberation Day | Guernsey |
| | Mother's Day | Latvia |
| | Resistance and Liberation Day | Lebanon |
| | Victory and Peace Day | Armenia |
| | Victory over Fascism Day | Azerbaijan |
| Monday 10 May 2027 | 2027-W19 | Mother's Day | El Salvador, Samoa |
| | Victory Day | Kazakhstan, Russia |
| | Ascension Day | Colombia |
| | Creation of the Polisario Front | Western Sahara |
| | Day of Memory and Honor | Uzbekistan |
| | Day of Rejoicing | Moldova |
| | Federated States of Micronesia Day | Micronesia |
| | Gospel Day | Tuvalu |
| | Victory over Fascism Day | Azerbaijan |
| Tuesday 11 May 2027 | 2027-W19 | Radunitsa (Day of Rejoicing) | Belarus |
| Wednesday 12 May 2027 | 2027-W19 | Independence Day | Israel |
| | Saint Andrew's Day | Georgia |
| Thursday 13 May 2027 | 2027-W19 | Buddha's Birthday | South Korea |
| | The Buddha's Birthday | Hong Kong |
| Friday 14 May 2027 | 2027-W19 | HM King Norodom Sihamoni's Birthday | Cambodia |
| | Kamuzu Day | Malawi |
| | National Holiday | Paraguay |
| | National Unification and Integration Day | Liberia |
| Saturday 15 May 2027 | 2027-W19 | Day of Arafah | Afghanistan, Djibouti, Egypt, Iraq, Jordan, Kuwait, Libya, Maldives, Saudi Arabia, Tunisia, United Arab Emirates |
| | Eid al-Adha | Oman, Sudan, Syria, Yemen |
| | Family Day | Venezuela |
| | National Independence Day | Paraguay |
| Sunday 16 May 2027 | 2027-W19 | Eid al-Adha | Afghanistan, Albania, Algeria, Azerbaijan, Bahrain, Benin, Bosnia & Herzegovina, Burkina Faso, Burundi, Cameroon, Central African Republic, Chad, Christmas Island, Cocos Islands, Comoros, Côte d'Ivoire, Djibouti, Egypt, Eritrea, Ethiopia, Gambia, Guinea, Guinea-Bissau, Iraq, Jordan, Kazakhstan, Kuwait, Kyrgyzstan, Lebanon, Libya, Maldives, Mali, Mauritania, Morocco, Niger, Oman, Palestine, Philippines, Qatar, Rwanda, Senegal, Sierra Leone, Somalia, Sudan, Suriname, Syria, Tajikistan, Timor-Leste, Togo, Tunisia, Turkey, Turkmenistan, Uganda, United Arab Emirates, Uzbekistan, Western Sahara, Yemen |
| | Pentecost | Åland Islands, Belgium, Caribbean Netherlands, Denmark, Estonia, Faroe Islands, Finland, Gabon, Greenland, Hungary, Iceland, Latvia, Liechtenstein, Madagascar, Netherlands, Norway, Poland, Sint Maarten, Slovenia, Svalbard & Jan Mayen, Sweden |
| | Eid al-Adha Holiday | Saudi Arabia |
| | Eid-ul-Adha | Ghana |
| | Solemnity of Pentecost | Vatican City |
| | SPLA Day | South Sudan |
| Monday 17 May 2027 | 2027-W20 | Eid al-Adha | Afghanistan, Albania, Algeria, Azerbaijan, Bahrain, Bangladesh, Brunei, Burundi, Cameroon, Christmas Island, Cocos Islands, Comoros, Egypt, Gambia, Guyana, India, Indonesia, Iran, Iraq, Lebanon, Libya, Malaysia, Mauritania, Morocco, Myanmar, Nepal, Nigeria, Oman, Pakistan, Palestine, Qatar, Rwanda, Sierra Leone, Singapore, Sudan, Syria, Tanzania, Turkey, Turkmenistan, Uzbekistan, Yemen |
| | Pentecost Monday | Andorra, Anguilla, Austria, Belgium, Benin, British Virgin Islands, Central African Republic, Congo, Côte d'Ivoire, Denmark, Faroe Islands, France, French Guiana, French Polynesia, French Southern Territories, Gabon, Germany, Greenland, Grenada, Guadeloupe, Hungary, Iceland, Liechtenstein, Luxembourg, Madagascar, Martinique, Mayotte, Monaco, Montserrat, Netherlands, New Caledonia, Réunion, Senegal, St Barthélemy, St Lucia, St Martin, St Pierre & Miquelon, St Vincent & Grenadines, Togo, Wallis & Futuna |
| | Eid al-Adha Holiday | Djibouti, Jordan, Kuwait, Maldives, Saudi Arabia, Tunisia, United Arab Emirates |
| | Whit Monday | Antigua & Barbuda, Bahamas, Barbados, Dominica, Solomon Islands, St Kitts & Nevis |
| | Constitution Day | Nauru, Norway, Svalbard & Jan Mayen |
| | Day after Eid al-Adha | Guinea, Niger |
| | Day of Family Sanctity and Respect for Parents | Georgia |
| | Discovery Day | Cayman Islands |
| | Girmit Day | Fiji |
| | Revolution and Armed Forces Day | DR Congo |
| Tuesday 18 May 2027 | 2027-W20 | Eid al-Adha | Afghanistan, Algeria, Azerbaijan, Bahrain, Bangladesh, Egypt, Iraq, Libya, Oman, Pakistan, Palestine, Qatar, Sudan, Syria, Turkey, Yemen |
| | Eid al-Adha Holiday | Jordan, Kuwait, Maldives, Nigeria, Saudi Arabia, Tunisia, United Arab Emirates |
| | Constitution and State Flag Day | Turkmenistan |
| | Flag Day and University Day | Haiti |
| Wednesday 19 May 2027 | 2027-W20 | Eid al-Adha | Bangladesh, Pakistan, Palestine, Sudan, Yemen |
| | Eid al-Adha Holiday | Maldives, Saudi Arabia |
| | Commemoration of Atatürk, Youth and Sports Day | Turkey |
| Thursday 20 May 2027 | 2027-W20 | Vesak Day | Indonesia, Malaysia, Singapore |
| | Buddha Jayanti | Nepal |
| | Buddha Purnima | India |
| | Commencement of the Armed Struggle | Western Sahara |
| | Full Moon Day of Kason | Myanmar |
| | Lord Buddha's Parinirvana | Bhutan |
| | National Day | Cameroon |
| | Restoration of Independence Day | Timor-Leste |
| | Shackleton Day | South Georgia |
| | The Buddha's Birthday | Mongolia |
| | Visaka Bochea Day | Cambodia |
| | Visakha Bucha | Thailand |
| Friday 21 May 2027 | 2027-W20 | Independence Day | Montenegro |
| | National Spiritual Baptist Day | St Vincent & Grenadines |
| | Navy Day | Chile |
| Saturday 22 May 2027 | 2027-W20 | Abolition of Slavery | Martinique |
| | Independence Day | Montenegro |
| | Unity Day | Yemen |
| Sunday 23 May 2027 | 2027-W20 | National Labour Day | Jamaica |
| | Solemnity of Holy Trinity | Vatican City |
| Monday 24 May 2027 | 2027-W21 | Day of Slavonic Alphabet, Bulgarian Enlightenment and Culture | Bulgaria |
| | Eid al-Ghadir | Iraq |
| | Independence Day | Eritrea |
| | National Labour Day | Jamaica |
| | Royal Ploughing Ceremony | Cambodia |
| | Saints Cyril and Methodius Day | North Macedonia |
| | The Battle of Pichincha | Ecuador |
| Tuesday 25 May 2027 | 2027-W21 | Africa Day | Guinea, Mali, Mauritania, Namibia, Zimbabwe |
| | Africa Freedom Day | Zambia |
| | Africa Liberation Day | Gambia |
| | Africa/Heroes Day | Lesotho |
| | African Liberation Day | Equatorial Guinea |
| | Eid al-Ghadir | Iran |
| | Independence Day | Jordan |
| | May Revolution Day | Argentina |
| Wednesday 26 May 2027 | 2027-W21 | Independence Day | Georgia, Guyana |
| Thursday 27 May 2027 | 2027-W21 | Corpus Christi | Austria, Bolivia, Croatia, Dominican Republic, Equatorial Guinea, Grenada, Haiti, Liechtenstein, Monaco, Poland, Portugal, San Marino, Seychelles, St Lucia, Timor-Leste, Trinidad & Tobago |
| | Abolition of Slavery | Guadeloupe |
| | Corpus Domini | Vatican City |
| Friday 28 May 2027 | 2027-W21 | Abolition of Slavery | St Martin |
| | Bermuda Day | Bermuda |
| | Genocide Remembrance Day | Namibia |
| | Independence Day | Azerbaijan |
| | Ratu Sir Lala Sukuna Day | Fiji |
| | Republic Day | Armenia |
| | Youm-e-Takbeer | Pakistan |
| Saturday 29 May 2027 | 2027-W21 | Presidential Inauguration Day | Nigeria |
| | Republic Day | Nepal |
| Sunday 30 May 2027 | 2027-W21 | Mother's Day | Madagascar, Nicaragua |
| | Anguilla Day | Anguilla |
| | Indian Arrival Day | Trinidad & Tobago |
| | Statehood Day | Croatia |
| Monday 31 May 2027 | 2027-W22 | Memorial Day | American Samoa, Guam, Northern Mariana Islands, Puerto Rico, United States, US Minor Outlying Islands, US Virgin Islands |
| | Spring Bank Holiday | Gibraltar, Guernsey, Isle of Man, Jersey, United Kingdom |
| | Anguilla Day | Anguilla |
| | Armed Forces Day | Brunei |
| | Corpus Christi | Colombia |
| | Indian Arrival Day | Trinidad & Tobago |
| | JAGS McCartney Day | Turks & Caicos |