Hi fellow hatchers. I have what seems like a fairly simple question regards timing/counting days for our hatch. The wife and I are new to this, and what an experience it has been. long story short, how does the 21 day cycle start? Day 1 or Day 0? We set at 1700 (5pm) on Sunday Feb 10th 13, we thought we were at Day 18 and locked down the incubator PM Wednesday 27th Feb 13, raised humidity and so on. Then, while laying in bed pondering all things hatch (sad, I know) I got to counting the day and wondered if we started the count right, all of a sudden, it was possible that we were actually on Day 17, then I over thought the process and ended up more confused. Is the 'set day' Day 0, then 24 hours later Day 1? Or is the 'set day' Day 1, then 24 hours later day 2 starts? Trying to find this answer before posting this thread I found a heap of people have hatch days either side of 21, and began to wonder if I am not the only person who began their count incorrectly. Thanks for your help in advance, Ben and Family.