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.

Prior to that, the last calendar day where downtown got more than an inch of rain was on March 13, when 1.03 of an inch fell.

From Los Angeles Times • Nov. 11, 2025

And the Charles M. Schulz-Sonoma County Airport near Santa Rosa recorded 2.72 inches, breaking the record for the calendar day set last year, when 1.85 inches fell.

From Los Angeles Times • Feb. 5, 2025

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

From BBC • Aug. 6, 2024

An outbreak this spring produced 22 tornadoes in Chicago’s expansive metro area, tying the record for the most in the region in a single calendar day, or a 24-hour span, the weather service said.

From Seattle Times • Jul. 14, 2023

We never got it on any dated calendar day.

From Essays — Second Series by Emerson, Ralph Waldo

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