(idiomatic) For an indefinite number of days.

(idiomatic) Every day; daily; constantly or continuously (especially, of something that has become routine or monotonous).

Compared to the same time period in the previous day.

You learn something new every day.

One of the dog days of summer: a late-summer day.

One person's working time for a day, or the equivalent, used as a measure of how much work or labor is required or consumed to perform some task.

plural of field day

plural of sports day

A school day set aside for athletics events.

A day celebrating George Washington and other presidents, a federal holiday in the United States, celebrated on the third Monday of February (formerly on the 22nd of February).