at short notice | at a moment’s notice

at short notice | at a moment’s notice

(North American English also on short notice)

​not long in advance; without warning or time for preparation

This was the best room we could get at such short notice.

You must be ready to leave at a moment's notice.

It's the best we can do at such short notice.

The team is ready to go anywhere in the world at a moment's notice.