I started my eggs in the evening too. Counted day one as 24 hrs. later (would be Thursday eve for you). We had power outages while mine were in lockdown - 17 hatched starting on day 20 and ending late on day 22. I don't know why some came early - just expect the unexpected! My eggs were all bantams too and sometimes they hatch early. I always let my eggs go to day 23 just to be sure.
Thanks for responding. I was counting it as Thursday evening being day one as well. Even though I know they shouldn't be piping until tomorrow at the earliest I keep looking in the window and looking, lol, anxious mommy!