Coronation
A Coronation is a ceremony held to crown a King and/or Queen. Coronations are, historically, grand events with great pomp and pagentry.
The coronation customs of various nations in period are widely varied, but most involved a public (and often religious) adknowlegement of the ruler's right to power.
Coronations In the SCA
SCA coronations are usually held at events specifically set up to be coronations. However, since most kingdoms have two coronations a year, the coronation itself is often low-key.
Most coronations involve the previous rulers stepping down and the new rulers taking the throne, followed by oaths of fealty from peers and populace. A public reading of new laws and goals for the reign then occurs, and the coronation ends with a procession. Kingdom business tends to wait until the first court after coronation (some wags in Ealdormere refer to the first court as "taking the shine off the hat").