Time

:For alternate uses of "time", see Time (disambiguation) or see TIME (magazine).

See also

• Event
• Duration
• Change
• Rate
• Causality
• Present (time)
• Cycles and List of cycles

General units of time

• second
• minute
• hour
• day
• week
• fortnight
• month
• quarter
• year
• decade
• century
• millennium

Special units of time

• Geologic timescale
• Season
• Era
• Cosmological decade
• Tithi
• Fiscal year
• Ship's bells
• Half-life
• Eon
• Periodization and list of time periods
• Unix epoch
• Swatch Internet Time
• Hexadecimal Time
• Shake (time)

Light-year is the distance light can travel in an Earth year and so is a unit of distance rather than time.

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Time measurement and horology

• calendar
• lunar calendar
• solar calendar
• chronometer
• Railroad chronometers
• clock
• water clock
• hourglass
• sundial
• time zone
• Time scales and time standards
• watch
• Network Time Protocol (NTP)

Theory and study of time

• philosophy of physics
• spacetime
• time travel
• exponential time
• Planck time
• orders of magnitude (time)
• Eternity
• Peter Lynds
• A Brief History of Time
• Periodization
• Chronology
• History
• Time discipline
• Time management
• wheel of time
• Timescapes