(temporal location, idiomatic, informal) In the distant past; especially, at a time fondly remembered.

(US) A Utah state holiday celebrating the arrival of Mormon pioneers in what became Salt Lake City, Utah, in 1847.

(idiomatic, sometimes humorous) To rescue a person or situation from imminent danger or major failure.

(idiomatic) A time period of years or more.

(US, Canada) A day in honor of one's mother on the second Sunday in May in the United States and Canada.

The day on which the euro became the official currency in much of Europe — 1st January 2002. / Election Day.

plural of Pioneer Day

(idiomatic) To cease the activity for the day. / (idiomatic) To retire.

(US), (Canada) The holiday marking the unofficial end of summer, held on the first Monday in September. / An annual holiday held on May 1 to celebrate the economic and social achievements of workers.

(religion) A religious festival for a particular saint or religious event.