noun
countdown
Used for counting down to an event, launch, or deadline. Often used as a noun or in suru-verb constructions.
ロケットの打ち上げまでカウントダウンが始まった。
The countdown to the rocket launch has begun.
新年までみんなでカウントダウンした。
We all counted down together to the new year.
Borrowed from English 'countdown'.