How long can an egg sit before incubation?

[Loriwellman]

I have access to 3 dozen eggs. some a day or two old. some that will be pulled today- I have 7 more days in this incubation run. Will they be good then? I don't want to add them now because lockdown and the increased humidity for hatching will be in just a few short days.

 

[sourland]

A general rule of thumb that many use is 10 days. A lot depends upon the conditions under which they are held. As a kid I had one incubator. I would hatch a batch, disinfect, and start another batch. Some eggs were held as long as 21 days. Eggs were stored in an earthen cellar - 50 - 65 % humidity and turned daily.