1. December 31

noun. The last day of the year.
Synonyms
Dec New Year's Eve day Hogmanay December
Antonyms
day night time off

2. mid-December

noun. The middle part of December.
Synonyms
period of time Dec period December time period
Antonyms
overtime work time downtime regulation time day

3. December

noun. The last (12th) month of the year.
Synonyms
Christmas Day Xmas Dec Christmas New Style calendar Gregorian calendar month New Year's Eve Christmastide Noel Gregorian calendar Yule Christmastime Dec 25 December 31 mid-December Yuletide
Etymology
December (English)
decembre (Eman)
decembre (Old French (842-ca. 1400))
december (Latin)
decem (Latin)

4. 31

adjective. Being one more than thirty.
Synonyms
cardinal thirty-one xxxi
Antonyms
ordinal unimportant quadrillionth 60th
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