(idiomatic) For an indefinite number of days.

daily. / focusing on one day at a time.

Compared to the same time period in the previous day.

Alternative letter-case form of Day the Music Died

(historical) February 3rd, 1959, the day when American rock and roll musicians Buddy Holly, Ritchie Valens, and "The Big Bopper" J. P. Richardson were killed in a plane crash near Clear Lake, Iowa, together with pilot Roger Peterson.

You learn something new every day.

(idiomatic) To enjoy the present and not worry about the future; to live for the moment. / (idiomatic) To make the most of today by achieving fulfillment in a philosophical or spiritual sense.

(dated, formal) A somewhat formal greeting generally used between sunrise and sunset. / (dated, formal) A dismissal; sometimes used to express annoyance.

November 20, the day of Zumbi's celebration. Usually only celebrated in Rio de Janeiro.

(US) A day on which a group of students, generally the senior class, leaves the campus and its responsibilities for a day.