Yes, the hours usually come up about 6 weeks in advance. Since you are going near the end of march, during the busy season of spring reak, the hours will probably be at their max (8am to 12 am) every day, and so will the entertainment offerings. Also, you can book your ADRs 60 days in advance, but they aren't near as popular and hard to get as ADRs in WDW. Lots of the time, you can just walk up and get seated right away! It is still good to reserve them in advance, just in case.