Where does “Christmastime” come from?

Christmastime derives from Middle English time, from Old French thym, from Latin thema, from Ancient Greek θέμα, ultimately from the Ancient Greek verb τίθημι meaning to place or set.

Christmastime (English): Christmas season; Christmastide; yuletide

Definitions

  1. Christmas season; Christmastide; yuletide

Ancestry of “Christmastime”, step by step

Christmastime traces back through two separate lines of ancestry.

via English Christmas

StepLanguageWordMeaning
1EnglishChristmasA festival or holiday commemorating the birth of Jesus Christ and incorporating various Christian, pre-Christian, pagan, and secular customs including gift-giving, which in Western Christianity is celebrated on December 25 (Christmas Day) in most places
2Middle EnglishCristemasseChristmas the 25th of December
3Old EnglishCristes mæsseChristmas
4Old Englishmæssemass
5Vulgar LatinmessaEucharist, dismissal; Eucharist; dismissal;...
6LatinmissaMass; Christian eucharistic liturgy; nominative...
7Latinmissumaccusative supine of mittō; inflection of...
8Latinmittōto send, dispatch, cause to go, let go, release, discharge
9Proto-Italicmeitōto put forth, put out
10Proto-Indo-Europeanmeyth₂-to hurt; to exchange, remove; to replace, to...

via English Time

StepLanguageWordMeaning
1EnglishTimeThe inevitable progression into the future with the passing of present and past events
2Middle Englishtymethyme; time; A specific duration or period of...
3Old Frenchthym
4Latinthymumthyme; accusative singular of thymus
5Ancient Greekθύμονthyme
6Ancient GreekθύωI offer in sacrifice, slay, burn, immolate; I...
7Proto-Indo-Europeandʰewh₂-smoke; mist, haze
Every word from Proto-Indo-European meyth₂-Every word from Proto-Italic meitōEvery word from Latin mittō