(University of Cambridge) A religiously or academically significant day; one on which festal academic dress should be worn.

(obsolete) the Sabbath / (obsolete) Saturday

(idiomatic) In the current era of history.

A day marking a country's establishment as a sovereign entity, typically a celebration of its independence, revolution or former ruler.

(Australia, Britain, New Zealand) A day on which school pupils are allowed to wear casual clothes which would on any other day be against the school's uniform policy.

(idiomatic, intensifier, simile) Unceasingly; very; thoroughly; to a very high degree.

(UK, historical) A festival formerly celebrated by the tin miners of Cornwall on the second Thursday before Christmas.

Any of various annual commemorative days that mark the start of an era of freedom, such as the end of apartheid in South Africa or the withdrawal of British troops from Malta.

(Australia) A public holiday held in Australia for the annual agricultural show in a state.

simple past tense and past participle of day-trip