Check your schedule when there is no Tuesday league game scheduled (March 18). The All-Star game is on Wednesday at whatever the normal game time is in your country. There is a 3-point contest before the game.
No league games are played on Tuesday, but there will be cup games, so anybody who wins this Thursday in the cup needs to check the schedule.
Thursday is an ordinary scrimmage date, but there are also cup games scheduled so that you can play 2 cup games next week. In countries with 3 divisions, this will be the cup semifinal and final.
Teams that are out of the cup will only have two games for training purposes next week: this Saturday's league game and the Thursday scrimmage.
The All-Star game is meaningless for training purposes. Injured players can play, and no one can be injured.