The hour (common symbol: h or hr) is a unit of measurement of time. In modern usage, an hour comprises 60 minutes, or 3,600 seconds. It is approximately 1/24 of a mean solar day.

An hour in the Universal Coordinated Time (UTC) time standard can include a negative or positive leap second, and may therefore have a duration of 3,599 or 3,601 seconds for adjustment purposes.

Although it is not a standard defined by the International System of Units, the hour is a unit accepted for use with SI, represented by the symbol h.

Read more about HourEtymology, History, Counting Hours, Derived Measures and Applications

Other articles related to "hour, hours":

PortAventura Park - Major Rides
... Height Length Year Shambhala Expedición al Himalaya Bolliger Mabillard 83 miles per hour (134 km/h) 249 feet (76 m) 5,410 feet (1,650 m) 2012 Dragon Khan Bolliger Mabillard 65 miles per ...
KYW (AM) - Station Identifications - KYW Jingle
... At the top of every hour, a recording of Dick Covington (who died in 2004 all other station imaging is done by Sean Caldwell) is played announcing the ... At 02, 12, 22, 32, 42 and 52 after the hour, traffic transit reports ("on the twos") are introduced with car horns sounding the first five notes of the KYW jingle ... At 30 past the hour, the recording is slightly different, with Covington announcing that "the newswatch never stops" (borrowed from sister station WINS ...
Miles Per Hour
... Miles per hour is an imperial unit of speed expressing the number of statute miles covered in one hour ... in Ireland, a judge considered a speeding case by examining speeds in both kilometres per hour and miles per hour ... of speed one knot is one nautical mile per hour ...
Rush Hour
... A rush hour or peak hour is a part of the day during which traffic congestion on roads and crowding on public transport is at its highest ...
Hour - Derived Measures and Applications
... for speed is meters per second, in everyday usage kilometres per hour or, in the USA and the UK, miles per hour are more practical ... Occasionally the metre per hour is used for slow-moving objects like snails ... based on working time in terms of number of hours worked, referred to as an hourly wage ...

Famous quotes containing the word hour:

    O love, if I regret the age when one savors you, it is not for the hour of pleasure, but for the one that follows it.
    Jean-Jacques Rousseau (1712–1778)

    For poetry, he’s past his prime,
    He takes an hour to find a rhyme;
    His fire is out, his wit decayed,
    His fancy sunk, his muse a jade.
    I’d have him throw away his pen,
    But there’s no talking to some men.
    Jonathan Swift (1667–1745)

    Around, the night drops swiftly down
    Its veils; does not condemn
    Or praise the different actions done.
    The hour that strikes across the town
    Caresses all and injures none
    As sleep approaches them.
    Philip Larkin (1922–1986)