How long can you wait?

[Country Gal]

I've been reading all the posts about hatching eggs, and I've seen the eggs for sale on the auction sites, and now I have a question...

How long will the egg be considered "viable" from lay to beginning of incubation???

 

[Chickfever]

According to this link: https://www.backyardchickens.com/media/b-5084.pdf (got it from "how to" pages) 7-10 days