NEW TO THIS..... a few questions

[daniellenoel]

Hello everyone
I am using the Brinsea Octagon 20 with my class of 3rd graders.
I set 18 eggs this morning around 10 am.
Temperature 99.3 Humidity 45% holding steady
When is my lock down day? Time?
When would my hatch day be?
I can never figure this out.

Thanks
Danielle

 

[SA Farm]

Chickens hatch on day 21. Lock down three days before.