TSV
Calendar Systems - TSV
Calendar systems are frameworks for measuring time and determining dates. There are three main types: solar, lunar, and lunisolar calendars, each using different astronomical phenomena as reference points. Various calendar systems exist rooted in different cultures and religions worldwide, such as the Gregorian, Julian, Hijri, and Chinese calendars, and they continue to be widely used in daily life, religious observances, and agricultural activities.
calendar
solar calendar
lunar calendar
lunisolar calendar
Gregorian calendar
Julian calendar
Islamic calendar
astronomy
code slug name description introduced leapYearRule origin type yearLength
01 gregorian-calendar Gregorian Calendar The current international standard solar calendar. 1582 Divisible by 4, except century years not divisible by 400 Europe Solar Calendar 365.2425
02 julian-calendar Julian Calendar A solar calendar established in ancient Rome. 46 BCE Every 4 years Rome Solar Calendar 365.25
03 islamic-calendar Hijri Calendar (Islamic Calendar) A pure lunar calendar used for Islamic religious observances. 639 CE None (30-year cycle with 11 leap days) Arabia Lunar Calendar 354.37
04 chinese-calendar Chinese Calendar (Lunisolar) A lunisolar calendar combining moon phases and solar movements. Ancient Leap month inserted 7 times per 19 years China Lunisolar Calendar 354
05 hebrew-calendar Hebrew Calendar A lunisolar calendar used in Judaism. Ancient 7 leap months per 19 years Middle East Lunisolar Calendar 354
06 persian-calendar Persian Calendar (Iranian Calendar) One of the most accurate solar calendars in the world. 1925 (modern version) Complex 33-year cycle Persia (Iran) Solar Calendar 365.242198
07 hindu-calendar Hindu Calendar A lunisolar calendar used in India with regional variations. Ancient Regional variations India Lunisolar Calendar 354
08 ethiopian-calendar Ethiopian Calendar A solar calendar used in Ethiopia, approximately 7-8 years behind the Gregorian calendar. Ancient Every 4 years Ethiopia Solar Calendar 365.25