When to start the countdown

[caliclucker]

Last Saturday evening I set my broody hen on 8 eggs. Do I start counting to day 21 starting on Saturday or Sunday? Thanks

 

[Impress]

Saturday, if they a set after noon it is always the next day that is officially one.

 

[SmittenChicken]

I read that eggs are just as likely to hatch on day 20 under a broody hen, and this was definitely the case with mine. So you might want to start looking for chicks a day early.