hour
Sign in to savethumb|Midnight to 1 a.m. on a 24-hour clock with a digital face
AI overview
An hour is a unit of time equal to 60 minutes, and it's one of the 24 equal divisions that make up a full day. Hours matter because they provide a standardized way to measure and organize time, allowing people to schedule activities, coordinate with others, and structure their daily routines.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Unit.name
- hour
- Unit.image
- AnalogClockAnimation1 2hands 1h in 6sec.gif
- Unit.caption
- Midnight (or noon) to 1 on a 12-hour clock with an analogue face
- Unit.symbol
- h
- Unit.symbol2
- hr
- Unit.standard
- Non-SI units accepted for use with SI
- Unit.quantity
- time
- Unit.units1
- SI units
- Unit.units2
- Non-SI units
via Wikipedia infobox
Article
25 sectionsContents
- Etymology<span class="anchor" id="Etymology"></span><span class="anchor" id="Names"></span><span class="anchor" id="Time of Day"></span><span class="anchor" id="Time of day"></span>
- History
- Antiquity
- Ancient Egypt
- Ancient Greece
- Middle Ages
- Modernity
- Counting hours
- Counting from dawn
- Unequal hours
- Counting from sunset
- Counting from noon
- Counting from midnight
- History of timekeeping in other cultures
- Egypt
- East Asia
- Southeast Asia
- India
- Derived measures
- See also
- Explanatory notes
- Citations
- General and cited references
- Further reading
- External links
thumb|Midnight to 1 a.m. on a 24-hour clock with a digital face
An hour (symbol: h; also abbreviated hr) is a unit of time historically reckoned as of a day and defined contemporarily as exactly 3,600 seconds (SI). There are 60 minutes in an hour, and 24 hours in a day.