calendar day

American

noun

the period from one midnight to the following midnight.

calendar day British

noun

See day

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of calendar day

First recorded in 1840–50

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

calendar day

At Scripps Pier in La Jolla, the sea surface temperature Monday was 73.8 degrees, significantly above the average for the calendar day, which is 64.7 degrees.

From Los Angeles Times ● Oct. 27, 2026

Downtown Los Angeles hit 105 degrees, tying the record for the calendar day.

From Los Angeles Times ● Sep. 10, 2026

Advent calendar day 22: GB's Kerr wins 1500m gold.

From BBC ● Aug. 6, 2024

Mark your calendars, y’all, because next Tuesday ain’t your average calendar day.

From Seattle Times ● Feb. 6, 2024

The attic is the place of all places you would most love to be on this particular calendar day!

From The Long Ago by J. W. (Jacob William) Wright

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023