noun
another day; a different day
Refers to a day other than the one previously mentioned or under consideration. Often used when rescheduling or referring to a future unspecified date.
会議は別日に延期になりました。
The meeting has been postponed to another day.
今日は都合が悪いので、別日にお願いできますか。
Today is inconvenient, so could we do it on another day?