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  2. Lunar calendar - Wikipedia

    en.wikipedia.org/wiki/Lunar_calendar

    Since the period of 12 such lunations, a lunar year, is 354 days, 8 hours, 48 minutes, 34 seconds (354.36707 days), [1] purely lunar calendars are 11 to 12 days shorter than the solar year. In purely lunar calendars, which do not make use of intercalation, the lunar months cycle through all the seasons of a solar year over the course of a 33 ...

  3. 360-day calendar - Wikipedia

    en.wikipedia.org/wiki/360-day_calendar

    The 360-day calendar is a method of measuring durations used in financial markets, in computer models, in ancient literature, and in prophetic literary genres.. It is based on merging the three major calendar systems into one complex clock [citation needed], with the 360-day year derived from the average year of the lunar and the solar: (365.2425 (solar) + 354.3829 (lunar))/2 = 719.6254/2 ...

  4. Astronomical basis of the Hindu calendar - Wikipedia

    en.wikipedia.org/wiki/Astronomical_basis_of_the...

    A candra māna varṣa or lunar year is made up of 12 consecutive candramāsa. [5] These twelve candramāsa are designated by unique names caitra, vaiśākha, etc. [note 2] In some instances an additional candramāsa, known as an adhikamāsa, is added to synchronise the candra māna varṣa with the solar year or saura māna varṣa.

  5. Epact - Wikipedia

    en.wikipedia.org/wiki/Epact

    A solar calendar year has 365 days (366 days in leap years).A lunar calendar year has 12 lunar months which alternate between 30 and 29 days for a total of 354 days (in leap years, one of the lunar months has a day added; since a lunar year lasts a little over ⁠354 + 1 / 3 ⁠ days, a leap year arises every second or third year rather than every fourth.)

  6. Lunar calendar - en.wikipedia.org

    en.wikipedia.org/.../page/mobile-html/Lunar_calendar

    Since the period of 12 such lunations, a lunar year, is 354 days, 8 hours, 48 minutes, 34 seconds (354.36707 days), [1] purely lunar calendars are 11 to 12 days shorter than the solar year. In purely lunar calendars, which do not make use of intercalation, the lunar months cycle through all the seasons of a solar year over the course of a 33 ...

  7. Lunisolar calendar - Wikipedia

    en.wikipedia.org/wiki/Lunisolar_calendar

    Record of the Chinese lunisolar calendar for 1834, 1835, and 1836 during the Qing dynasty under the Daoguang Emperor's Reign (道光十四年,道光十五年,道光十六年) A lunisolar calendar is a calendar in many cultures, that combines monthly lunar cycles with the solar year. As with all calendars which divide the year into months ...

  8. Burmese calendar - Wikipedia

    en.wikipedia.org/wiki/Burmese_calendar

    The Burmese calendar uses lunar months but tries to keep pace with the solar year. The present Thandeikta system's solar year is about 23 minutes 51.43 seconds ahead of the actual mean tropical year of 365.241289 days. The older Makaranta system was actually slightly more accurate, with 23 minutes 50.87 seconds ahead of the actual year. [20]

  9. Solar calendar - Wikipedia

    en.wikipedia.org/wiki/Solar_calendar

    The oldest solar calendars include the Julian calendar and the Coptic calendar. They both have a year of 365 days, which is extended to 366 once every four years, without exception, so have a mean year of 365.25 days. As solar calendars became more accurate, they evolved into two types.