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The Babylonian calendar began with the first new moon after the March equinox, the day after the return of the Sumerian goddess Inanna (later known as Ishtar) from the underworld, in the Akitu ceremony, with parades through the Ishtar Gate to the Eanna temple and the ritual re-enactment of the marriage to Tammuz, or Sumerian Dummuzi. [citation ...
An ecclesiastical new moon is the first day of a lunar month (an ecclesiastical moon) in an ecclesiastical lunar calendar. Such months have a whole number of days, 29 or 30, whereas true synodic months can vary from about 29.27 to 29.83 days in length.
This is an accepted version of this page This is the latest accepted revision, reviewed on 13 June 2024. Position of the year within the 19-year Metonic cycle Not to be confused with Golden ratio. Month of January from Calendarium Parisiense (fourth quarter of the 14th c.). The golden numbers, in the leftmost column, indicate the date of the new moon for each year in the 19-year cycle A golden ...
2020-05-22 or 2020-08-19. This depends on the exact definition of the seasons: If northern summer is deemed to begin at the June solstice then the 2020-06-21 new moon occurs in northern summer. If the seasons are defined in quarter tropical years from the December solstice then the 2020-06-21 new moon occurs in northern spring.
The Lunation Number or Lunation Cycle is a number given to each lunation beginning from a specific one in history. Several conventions are in use. The most commonly used was the Brown Lunation Number (BLN), which defines "lunation 1" as beginning at the first new moon of 1923, the year when Ernest William Brown's lunar theory was introduced in the American Ephemeris and Nautical Almanac.
The duration from full moon to new moon (or new moon to full moon) varies from approximately 13 days 22 + 1 ⁄ 2 hours to about 15 days 14 + 1 ⁄ 2 hours. Due to lunar motion relative to the meridian and the ecliptic, in Earth's northern hemisphere: A new moon appears highest at the summer solstice and lowest at the winter solstice.
The Lunar New Year is an event celebrated by billions of people across the world on the first new moon of their calendar. Although often referred to as "Lunar New Year" in English, this is a misnomer, as it refers to both celebrations based on a lunar calendar as well as a lunisolar calendar.
However, at the start of the new year, a saltus lunae increases the epact by another unit, and the new moon should have occurred on the previous day. So a new moon is missed. The calendarium of the Missale Romanum takes account of this by assigning epact label "19" instead of "xx" to 31 December of such a year, making that date the new moon. It ...