Misspelling of heyday.

Alternative form of daybook

To spend the day enjoying oneself by engaging in pleasurable activities.

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

(aviation, military) An aviator (usually a fighter pilot) who destroys five or more enemy aircraft (the number required to become an ace) in a single day.

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

Short for Victory Day. / (informal) Short for Valentine's Day.