当日(とうじつ)

WORD FORMATION:
当(とう) (this, the relevant) + 日(じつ) (day)

USAGE:
Refers to the specific day being discussed or the day of an event. Can mean "that day" (referring to a past event) or "on the day" (same-day, as opposed to in advance).

COMMON COLLOCATIONS:

• 当日(とうじつ)券(けん): same-day ticket
• 当日(とうじつ)予約(よやく): same-day reservation
• 当日(とうじつ)キャンセル: same-day cancellation
• イベント当日(とうじつ): the day of the event
• 当日(とうじつ)受付(うけつけ): on-site registration

DAY SEQUENCE:

• 前日(ぜんじつ): the day before
• 当日(とうじつ): that day, the day of
• 翌日(よくじつ): the next day, the following day