be the day hell freezes over

To be an impossible or incredibly unlikely point or event in the future. The day that a Democrat like him gets elected in a blue-collar Republican town like this will be the day hell freezes over.

Common Names:

Name	Pronounced	Usage
Alemayehu	-	Eastern African, Amharic
Ace (1)	AYS	English
Sixtine	-	French
Tasoula	-	Greek
Signe	SEENG-ne (Swedish, Norwegian), SEE-ne (Danish)	Swedish, Norwegian, Danish
Lynsay	LIN-zee	English (Rare)