| May 15 | Wednesday | Family Day | Armenia, Moldova, Mongolia, Ukraine |
|---|
| | Day of Customs and Traditions | Burkina Faso |
| | Teacher's Day | Colombia, South Korea |
| | Buddha's Birthday | Hong Kong, Macau |
| | Buddha’s Birthday | South Korea |
| | Independence Day | Paraguay |
| May 16 | Thursday | Day of Students and Youth | Armenia |
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| | SPLA Day | South Sudan |
| May 17 | Friday | Liberation Day | Congo Democratic Republic |
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| | Galicia Literature Day | Spain |
| | Birthday of the Raja of Perlis | Malaysia |
| | 17 May Constitution Day (1814) | Norway |
| | Constitution Day | Nauru |
| May 18 | Saturday | Flag Day/University Day | Haiti |
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| | Whit Saturday | Norway, Sweden |
| | Restoration of Somaliland Sovereignty | Somalia |
| | Constitution Day | Turkmenistan |
| | Battle of Las Piedras | Uruguay |
| May 19 | Sunday | Whit Sunday | Andorra, Austria, Australia, Barbados, Belgium, The Bahamas, Canada, Switzerland, Czechia, Germany, Denmark, Estonia, Spain, Finland, Faroe Islands, France, French Guiana, Guadeloupe, Hungary, Iceland, Liechtenstein, Luxembourg, Latvia, Monaco, Saint Martin, Madagascar, Martinique, New Caledonia, Netherlands, Norway, Poland, Sweden, Slovenia, Sint Maarten, United Kingdom, United States, Mayotte |
|---|
| | Restoration of Somaliland Sovereignty Holiday | Somalia |
| | Commemoration of Atatürk, Youth and Sports Day | Turkey |
| May 20 | Monday | Whit Monday | Andorra, Antigua and Barbuda, Anguilla, Austria, Australia, Barbados, Belgium, Benin, St. Barts, The Bahamas, Canada, Central African Republic, Congo, Switzerland, Cote d'Ivoire, Czechia, Germany, Denmark, Dominica, Spain, Faroe Islands, France, Gabon, Grenada, French Guiana, Greenland, Guadeloupe, Hungary, Iceland, Saint Kitts and Nevis, Saint Lucia, Liechtenstein, Luxembourg, Monaco, Saint Martin, Madagascar, Mali, Martinique, Montserrat, New Caledonia, Netherlands, Norway, French Polynesia, Saint Pierre and Miquelon, Reunion, Solomon Islands, Saint Helena, Senegal, Togo, United Kingdom, United States, Saint Vincent and the Grenadines, British Virgin Islands, Wallis and Futuna, Mayotte |
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| | National Patriots' Day | Canada |
| | Victoria Day | Canada |
| | National Day | Cameroon |
| | Independence Day | Cuba |
| | Discovery Day | Cayman Islands |
| | Azores Day | Portugal |
| | Restoration of Independence Day | East Timor |
| May 21 | Tuesday | Navy Day | Chile |
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| | Independence Day | Montenegro |
| | Saint Helena Day | Saint Helena |
| May 22 | Wednesday | Visak Bochea Day | Cambodia |
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| | Bălți Day | Moldova |
| | Independence Day Holiday | Montenegro |
| | Abolition Day | Martinique |
| | Wesak Day | Malaysia |
| | Pahang State Holiday | Malaysia |
| | Leiria Day | Portugal |
| | Vesak Day | Singapore |
| | Visakha Bucha | Thailand |
| | Unity Day | Yemen |
