A Roman Catholic holiday commemorating Saint Patrick, the patron saint of Ireland on 17ᵗʰ March.

The saint's day of Saint George, the patron saint of England, celebrated on April 23ʳᵈ.

(literally) A day when one's hair seems unmanageable. / (idiomatic, by extension) A day when things seem to be unmanageable or go wrong.

Used other than figuratively or idiomatically: see have, a, nice, day. / (US, Canada, rather formal). en

(Christianity) An annual feast day celebrating the faithful departed on the second day of November, immediately following All Saints' Day. / (uncommon) Synonym of Tomb Sweeping Day, a Chinese holiday.

A day marked in red on calendars; a church feast day. / (idiomatic) A particularly significant day; a day of personal or sectarian celebration.

(Christianity) In Christian tradition, the annual feast day celebrating the life of all saints, taking place on the first day of November, or (in the Greek church) on the first Sunday after Pentecost.

Alternative form of St. George's Day

(idiomatic) To acknowledge someone; to give someone respect or attention; to tip one's hat

A Christian feast day, 1st November, honouring the saints (or, as the name implies, "hallows"); the day after Halloween.