(biology, holidays, celebrations) November the 24th; the day that celebrates the publication of On the Origin of Species by Charles Darwin, and evolutionary biology, evolution science.

plural of day at the beach

(figuratively) An occasion to defend oneself or one's opinion.

Misspelling of heyday.

Alternative form of daybook

A Mexican holiday, held on November 1 and 2, and associated with the Catholic celebrations of All Saints' Day and All Souls' Day.

(gay slang) A period of mild weather that permits men to wear garments light enough to reveal the contours of their genitalia.

(education) A day on which an institution (such as a farm or a university) hosts visitors who come to learn about it.

plural of access day

(informal) A day on which women hold a party around the time of Saint Valentine's Day, typically on February 13.