Okay, just needing help double checking my math... if I need to get the eggs to the classroom 3 days before hatching (day 18), and still give them enough time to watch them... I'd have to get them there on a Monday or Tuesday.... so if I start setting the eggs on the 30th or the 1st, that would work, right? Incubation period is 21 days, yes? Do you count incubation from the day you put them in the incubator? And what time on day 18 do you start lockdown? Or is it just some point early in the day to start that?