English Idioms About “Time”
Idiom: Rough time
Meaning: The idiom rough time means a hard or bad time.
Example: It was such a rough time.

English Idioms About “Animals”
Idiom: when pigs fly
Meaning: If you say when pigs fly you mean that something will never happen. This phrase is used presumably due to the unlikelihood that pigs will ever evolve wings.
Example: Sure she’ll help us clean the house — when pigs fly.