On average, this is 24 hours (86,400 seconds). As a day passes at a given location it experiences morning, afternoon, evening, and night. This daily cycle drives circadian rhythms in many …

The meaning of DAY is the time of light between one night and the next. How to use day in a sentence.

November 12, 2025 - Today is Chadwick Boseman Day, National Happy Hour Day, National Donor Sabbath, Chicken Soup for the Soul Day, and National French Dip Day.

DAY definition: 1. a period of 24 hours, especially from twelve o'clock one night to twelve o'clock the next night…. Learn more.

Definition of day noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

1. Of or relating to the day. 2. Working during the day: the day nurse. 3. Occurring before nightfall: a day hike.

Day is the time when it is light, or the time when you are up and doing things. The weather did not help; hot by day, cold at night. 27 million working days are lost each year due to work …

The day formerly began at sunset, hence Old English Wodnesniht was what we would call "Tuesday night." Names of the weekdays were not regularly capitalized in English until 17c. …

5 days ago · The time taken for the Earth to make a full rotation about its axis with respect to the fixed stars; a sidereal day or stellar day. (informal or meteorology) A 24-hour period beginning …

Idioms call it a day, to stop working for the rest of the day: Let's call it a day; we've worked eighteen hours. Idioms day in, day out, every day without fail;