So one obvious time would be before the start of each new season, and then at the start of interconference play, and then intraconference play.
Yes, I was very surprised to find out I couldn't change the ticket prices when I reached the playoffs last season. I don't really understand the argument against being able to change ticket prices weekly anyway. Clubs in many sports change more for premium games (better opponents or weekend games), and every club charges more for playoff games.
If that is true I suggest demand be higher for playoff games.