The One Millennium Fest lasts ten days. The most awaited day is the first day because the Guardians, the group of Elves that no ordinary Elves can casually interact with, become everyone's entertainers. They will step into the stage and amaze everyone with their non-battle-related skills. They will sing, dance, and even perform a farce.
Technically speaking, their goal is not to entertain ordinary folks. They do things that citizens do to entertain their ruler and honorable guests. In this case, they aim to entertain me, someone whom their Queen respects greatly. They are putting their all into their performance, so there is no way I am not entertained.