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.
We're counting down to the New Year.
The countdown to the release has begun.
We've entered the countdown to the opening.