A day in a liturgical calendar that is observed in honour of a saint; not necessarily a holiday.

The business to be done by a body (such as a legislature) on a particular day; an agenda. / The most significant aspect of something; what is necessary or appropriate.

(idiomatic, abstractly) Healthy eating and living using traditional temperate-zone fresh foods.

(figuratively) The date of any major event planned for the future.

An annual celebration commemorating the anniversary of a nation's assumption of independent statehood.

(set phrase) At some unspecified time in the future. / At some unspecified time in the past. / Used other than figuratively or idiomatically: see one, day.

Lasting throughout the whole day. / Available throughout the whole day.

Used other than figuratively or idiomatically: see market, day. / The day of the week in which a market is held in some particular location.

(Canada) A holiday, originally to give thanks to God for the harvest, celebrated annually on the second Monday of October.

The interval between consecutive high tides at a given place.