same day; on the day
Used adverbially or as a noun to indicate that something happens or is done on the same day, often in formal, business, or news contexts.
即日発送いたします。
We will ship it the same day.
面接の結果は即日通知された。
The interview result was announced on the same day.
The procedure is completed on the same day.
The new rule is effective from the same day.
same-day special delivery
same-day ballot counting