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.

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

(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.

A day or time that has already passed.

A day in which bins, bags or boxes containing household or commercial waste or rubbish are collected, or due to be collected, by waste disposal officers (typically council employees called binmen or dustmen)