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
Araceli	ah-rah-THE-lee (Spanish), ah-rah-SE-lee (Latin American Spanish)	Spanish
BlÁThnaid	-	Irish
AmbroŻY	-	Polish (Rare)
Marijke	MAH-rie-kə	Dutch
Rihanna	-	Arabic
Tariro	-	Southern African, Shona