Coronation Day
Coronation Day is the day of the formal crowning of a monarch or its anniversary as observed as an annual commemoration or festival. The name is also frequently used for accession days, the dates or anniversaries of the formal assumption of rule in ceremonies that do not involve a crown.
| Nation | Monarch | Date |
| Cambodia | Norodom Sihamoni | 29 October 2004 |
| Thailand | Vajiralongkorn | 4 May 2019 |
| United Kingdom | Charles III | 6 May 2023 |
| Ethiopia | Haile Selassie | 2 November 1930 |