The evening before Christmas Day. / The day before Christmas Day.

Used to express good wishes on or before Christmas Day.

A conifer used during the Christmas holiday season, typically decorated with lights and ornaments and often a star or angel at its tip.

A festival/holiday commemorating the birth of Jesus Christ and incorporating various Christian, pre-Christian, pagan and secular customs, which is celebrated on December 25 in most places.

(US) Red and green (traditional Christmas colors), especially red and green chile sauce in New Mexican cuisine.

A person from Christmas Island, or having that ancestry.

The Christian world. / (now rare) The state of being a (devout) Christian; Christian belief or faith. / (obsolete) The name received at baptism; any name or appellation.

Alternative form of Merry Christmas

A traditional greeting for Christmas and the new year.

The season or time made up of the twelve days between Christmas and Epiphany; Christmas season, Christmas time, Christmastide, Twelvetide. The Christmas season traditionally ended with the feast of the Epiphany on January 6.