When will Polish hatch?

[MsHumble12]

It's day 23 and our Polish eggs haven't hatched yet. We're completly new to this. I've read other threads that say to be patient, but how long do I wait? When should I candle them again? We had 4 eggs. Two didn't make it past 12 days so now I'm worried about these two.

 

[bugglesmommy]

Low temps can make for later hatches, but I think you should candle or float at this point if the eggs are not rocking, cheeping or pipped.