Markdown
Calendar Systems - Markdown
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 |