All the games that you play once a day get their bonus points awarded at the end of the day. There are also any hourly games that you play during the last hour.
If you want to know which games award bonus points, you can find out by going to the game's opening page and clicking on Game Notes. The screen that appears tells you how bonus points are awarded for that game. The World Quiz, Pot of Gold, The Daily Trivia Game, New Question Game award bonus points; Mind Melt and Who Am I do not. I haven't checked all the hourly games.
(Editor in Humanities, Religion, Literature and Books For Children)
That's all, folks!