WebAn hour (symbol: h; also abbreviated hr) is a unit of time historically reckoned as 1 ⁄ 24 of a day and defined contemporarily as exactly 3,600 seconds . There are 60 minutes in an hour, and 24 hours in a day. The hour was initially established in the ancient Near East as a variable measure of 1 ⁄ 12 of the night or daytime.
Weba. : the time of day reckoned in two 12-hour periods. b. hours plural : the time reckoned in one 24-hour period from midnight to midnight using a 4-digit number of which the first two digits indicate the hour and the last two digits indicate the minute. in the military 4:30 p.m. is called 1630 hours. 4.
Webhour noun [ C ] us / ɑʊər / (abbreviation hr.) a period of 60 minutes: Take this an hour after eating. It’s open 24 hours a day. He works long hours (= starts work early and finishes …
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Webnoun. a period of time equal to 3600 seconds; 1/24 th of a calendar dayRelated adjectives: horal, horary. any of the points on the face of a timepiece that indicate intervals of 60 minutes. the hour an exact number of complete hours the bus leaves on the hour. the time of day as indicated by a watch, clock, etc.
WebTime Card Calculator | Time Calculator. An hour is most commonly defined as a period of time equal to 60 minutes, where a minute is equal to 60 seconds, and a second has a rigorous scientific definition. There are also 24 hours in a day. Most people read time using either a 12-hour clock or a 24-hour clock.
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WebThe Hour of Code is a one-hour introduction to computer science, using fun tutorials to show that anybody can learn the basics. This grassroots campaign is supported by over 400 partners and 200,000 educators worldwide. Try an activity. Read our How-to guide to plan an event for your class.
