Socialism doesn't require class abolition, though it's a goal in transition to communism.
Class abolition doesn't require work abolition, only that everybody belongs to a single class which is based on ownership of MoP, simplified, if everyone works and nobody extracts rent, there is no class distinction.
Work abolition doesn't require bedtime abolition, there's just straight up no causal relationship, it's possible to have bedtimes with any regular schedule that's not necessarily work.
Bedtime abolition only requires school reformation so that it is less rigid — I would welcome that but it's an area that needs to be threaded very carefully and experimentations there raise ethical questions I don't have answers to.