I am hatching chicks in my 6th-grade classroom. I put the eggs in the incubator at midday on April 12. The incubator says that there is 4 days until hatch. So, today is technically day 17 correct? I know it says to remove the egg turner and increase humidity on day 18. Since tomorrow is Saturday, would it be ok for me to do that today before I leave for the weekend or should I come in tomorrow to do it? Thank you! 
