| 17 May Constitution Day (1814) | Norway | National Holiday, Flag Day |
| 17 May Constitution Day (1814) | Norway | National Holiday, Flag Day |
| 17 May Constitution Day (1814) | Norway | National Holiday, Flag Day |
| 17 May Constitution Day (1814) | Norway | National Holiday, Flag Day |
| 17 May Constitution Day (1814) | Norway | National Holiday, Flag Day |
| 17 May Constitution Day (1814) | Norway | National Holiday, Flag Day |
| 17 May Constitution Day (1814) | Norway | National Holiday, Flag Day |
| Armed Forces Day | United States | Observance |
| Ascension Day | Colombia | National Holiday |
| Constitution Day | Nauru | Public Holiday |
| Constitution Day | Nauru | Public Holiday |
| Constitution Day | Nauru | Public Holiday |
| Constitution Day | Nauru | Public Holiday |
| Constitution Day | Nauru | Public Holiday |
| Constitution Day | Nauru | Public Holiday |
| Constitution Day | Nauru | Public Holiday |
| Discovery Day | Cayman Islands | Public Holiday |
| Europe Day | Ukraine | Observance |
| Galicia Literature Day | Spain | Local Holiday (galicia |
| Galicia Literature Day | Spain | Local Holiday |
| Galicia Literature Day | Spain | Local Holiday |
| Galicia Literature Day | Spain | Local Holiday |
| Galicia Literature Day | Spain | Local Holiday |
| Galicia Literature Day | Spain | Local Holiday |
| Galicia Literature Day | Spain | Local Holiday |
| Great Prayer Day | Denmark | National Holiday |
| Liberation Day | Congo Democratic Republic | Public Holiday |
| Liberation Day | Congo Democratic Republic | Public Holiday |
| Liberation Day | Congo Democratic Republic | Public Holiday |
| Liberation Day | Congo Democratic Republic | Public Holiday |
| Liberation Day | Congo Democratic Republic | Public Holiday |
| Liberation Day | Congo Democratic Republic | Public Holiday |
| National Defense Transportation Day | United States | Observance |
| National Defense Transportation Day | United States | Observance |
| Prayer Day | Faroe Islands | Public Holiday |
| Preakness Stakes | United States | Sporting Event |
| Shavuot | United Kingdom | Jewish Holiday |
| Shavuot | Australia | Jewish Holiday |
| Shavuot | Canada | Jewish Holiday |
| Shavuot | Israel | National Holiday, Hebrew |
| Shavuot | United States | Jewish Holiday |