شابلون:Time topics

Key concepts

Chronometry	UTC UT TAI Unit of time Orders of magnitude (time)
Measurement systems	Italian six-hour clock Thai six-hour clock Hindu 12-hour clock 24-hour clock Relative hour یای ساعاتی Decimal Hexadecimal Metric Sidereal Solar چاغ بؤلگه‌سی
تقویمs	Main types Solar Lunar Lunisolar Gregorian Julian Hebrew Islamic Solar Hijri Chinese Hindu Panchang Maya List
ساعاتs	Main types astronomical astrarium atomic quantum hourglass marine گونش ساعاتی watch mechanical stopwatch water-based Cuckoo clock Digital clock Grandfather clock History Timeline

Time in علم

ژئولوژی	Geological time age chron eon epoch era period Geochronology Geological history of Earth
Physics	Absolute space and time Arrow of time Chronon Coordinate time Proper time فضازامان نیسبیت نظریه‌سی Time domain Time translation symmetry Time reversal symmetry
Other fields	Chronological dating Chronobiology Circadian rhythms Clock reaction Glottochronology Time geography