save, keep, etc. something for a rainy day

idiomPart ofday

save, keep, etc. something for a rainy day — idiom

1. To save something, especially money, for a future time of need.

1.idiom
Definition

To save something, especially money, for a future time of need.

Example

I put some money aside for a rainy day.

She saved the extra cookies for a rainy day.