I set my 1st ever eggs on Fri 4/1, about 7pm. They started hatching about noon Fri, moving along fairley fast and I had 6 by about 3 yesterday afternoon. Then I had 1 more hatch over night. So would the 21st day be from Fri 7pm to Sat 7pm, and the 22nd day be from Sat 7pm to today at 7pm or would fri be the 21st day, Sat the 22, today the 23rd. How long should I wait on my unhatched eggs.