Dictionary

calendar year

noun

: the period of time from January 1 to December 31

Full Definition of CALENDAR YEAR

1
:  a period of a year beginning and ending with the dates that are conventionally accepted as marking the beginning and end of a numbered year
2
:  a period of time equal in length to that of the year in the calendar conventionally in use
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First Known Use of CALENDAR YEAR

circa 1909

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