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  2. Conversion between Julian and Gregorian calendars - Wikipedia

    en.wikipedia.org/wiki/Conversion_between_Julian...

    No guidance is provided about conversion of dates before March 5, -500, or after February 29, 2100 (both being Julian dates). For unlisted dates, find the date in the table closest to, but earlier than, the date to be converted. Be sure to use the correct column. If converting from Julian to Gregorian, add the number from the "Difference" column.

  3. Perpetual calendar - Wikipedia

    en.wikipedia.org/wiki/Perpetual_calendar

    A perpetual calendar is a calendar valid for many years, usually designed to look up the day of the week for a given date in the past or future. For the Gregorian and Julian calendars, a perpetual calendar typically consists of one of three general variations: Fourteen one-year calendars, plus a table to show which one-year calendar is to be ...

  4. Cosmic Calendar - Wikipedia

    en.wikipedia.org/wiki/Cosmic_Calendar

    A graphical view of the Cosmic Calendar, featuring the months of the year, days of December, the final minute, and the final second. The Cosmic Calendar is a method to visualize the chronology of the universe, scaling its currently understood age of 13.8 billion years to a single year in order to help intuit it for pedagogical purposes in science education or popular science.

  5. Calendar date - Wikipedia

    en.wikipedia.org/wiki/Calendar_date

    In most calendar systems, the date consists of three parts: the (numbered) day of the month, the month, and the (numbered) year. There may also be additional parts, such as the day of the week. Years are usually counted from a particular starting point, usually called the epoch, with era referring to the span of time since that epoch.

  6. Lunar calendar - Wikipedia

    en.wikipedia.org/wiki/Lunar_calendar

    A lunar calendar is a calendar based on the monthly cycles of the Moon 's phases ( synodic months, lunations ), in contrast to solar calendars, whose annual cycles are based on the solar year. The most widely observed purely lunar calendar is the Islamic calendar. [ a] A purely lunar calendar is distinguished from a lunisolar calendar, whose ...

  7. Hindu calendar - Wikipedia

    en.wikipedia.org/wiki/Hindu_calendar

    Calendars used by Hindus worldwide. A page from the Hindu calendar 1871-72. The Hindu calendar, also called Panchanga(Sanskrit: पञ्चाङ्ग), is one of various lunisolar calendarsthat are traditionally used in the Indian subcontinentand Southeast Asia, with further regional variations for social and Hindureligious purposes.

  8. Juche calendar - Wikipedia

    en.wikipedia.org/wiki/Juche_calendar

    calendar. The Juche calendar, named after the Juche ideology, is the system of year-numbering used in North Korea. It begins with the birth of Kim Il Sung, the founder of North Korea. His birth year, 1912 in the Gregorian calendar, is " Juche 1" in the Juche calendar. The calendar was adopted in 1997, three years after the death of Kim Il Sung .

  9. Zulu calendar - Wikipedia

    en.wikipedia.org/wiki/Zulu_calendar

    The Zulu calendar is the traditional lunisolar calendar used by the Zulu people of South Africa. [ 1] Its new year begins at the new moon of uMandulo (September) in the Gregorian calendar . The Zulu calendar is divided into two seasons, the summer iHlobo and Winter ubuSika. [ 2] The lunar seasonal calendar has 13 months [ 3] that do not ...