Accession

Accession is the attainment or acquisition of a position of rank or power, typically that of monarch or president. Eg."the queen's accession to the throne".

Accession day is a celebration. It is usually the anniversary of when a monarch takes office. The earliest record of accession celebrations are from the reign of Queen Elizabeth I of England.

Accession is not the same as coronation or inauguration. Coronation and inauguration are both ceremonies which take place after the accession.

This short article about politics can be made longer. You can help Wikipedia by adding to it.