When pigs fly
kɑ̃ le koʃɔ̃ volʁɔ̃
In French Quand les cochons voleront
This is a direct translation, and the idiom is well-known in French.
Example
"Je lui pardonnerai quand les cochons voleront."
kɑ̃ le koʃɔ̃ volʁɔ̃
In French Quand les cochons voleront
This is a direct translation, and the idiom is well-known in French.
"Je lui pardonnerai quand les cochons voleront."