Synonyms

night and day

Idioms

Also day and night. Continually, without stopping. This phrase is used either literally, as in The alarm is on night and day, or hyperbolically, as in We were working day and night on these drawings. Shakespeare put it by night and day in The Comedy of Errors (4:2): “Time comes stealing on by night and day.”

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.

The ice lid contracts and expands with temperature fluctuations between night and day, opening cracks that fill with shards of newly frozen lake water.

From Barron's • Feb. 15, 2026

“Anybody who has flown on a Starlink-equipped aircraft will say it was night and day between anything they experienced in the past,” Quilty said.

From MarketWatch • Feb. 11, 2026

“Converting a building from 1990 versus one from 2010 is night and day due to the differences in code eras.”

From Los Angeles Times • Feb. 11, 2026

"Since the flooding began, our teams have worked through the night and day dealing with more than 200 call-outs," the authority said.

From BBC • Jan. 29, 2026

“You ain’t got to ast’m. You jest got to let’m. Soon as he gits over the chill, y’all go’n be spongin’ him off night and day.

From "Cold Sassy Tree" by Olive Ann Burns

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