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  2. March equinox - Wikipedia

    en.wikipedia.org/wiki/March_equinox

    The Jewish Passover usually falls on the first full moon after the Northern Hemisphere vernal equinox, [19] although occasionally (currently three times every 19 years [citation needed]) it will occur on the second full moon. [20] The Christian Churches calculate Easter as the first Sunday after the first full moon on or after the March equinox ...

  3. Byzantine calendar - Wikipedia

    en.wikipedia.org/wiki/Byzantine_calendar

    Anatolius says that he places the new moon of the first year of his cycle on the Alexandrian equivalent of 22 March, the day of the vernal equinox. In the Julian calendar, the equinox recedes at the rate of 1 day in 128 years; by the time of the First Council of Nicaea in AD 325 it was falling on 21 March. 22 March is 26 Phamenoth in the ...

  4. Here's How Easter Sunday Is Determined Every Year - AOL

    www.aol.com/heres-easter-sunday-determined-every...

    In 2023, the vernal equinox falls on March 20, 2023, making the first full moon after that date April 6 and the following Sunday—April 9—Easter 2023. dtimiraos - Getty Images Easter Sunday ...

  5. Inter gravissimas - Wikipedia

    en.wikipedia.org/wiki/Inter_gravissimas

    The bull identifies "three necessary" things for the correct determination of Easter dates: correct placement of the northern vernal equinox; correct identification of the "14th day of the moon" (effectively full moon) that happens on or next after the vernal equinox, and the first Sunday that follows that full moon.

  6. The science behind the vernal equinox - AOL

    www.aol.com/news/science-behind-vernal-equinox...

    The beginning of spring is known as the vernal equinox. Let's find out how it happens. Seasons change all the time. The changing of the seasons is either a solstice or an equinox. The beginning of ...

  7. What Is the Spring Equinox and What Does It Mean for Your ...

    www.aol.com/entertainment/spring-equinox-does...

    The spring equinox—aka the vernal equinox or simply, “the first day of spring”—is coming up this Saturday, March 20th. In the Northern Hemisphere, this means that the sun crosses over the ...

  8. First Council of Nicaea - Wikipedia

    en.wikipedia.org/wiki/First_Council_of_Nicaea

    The Finnish Orthodox Church explains, "According to the definition of the Council of Nicaea in 325, Pascha is celebrated on the first Sunday after the full moon following the vernal equinox, but always after the Jewish Passover. The date of the vernal equinox was then defined as March 21."

  9. Baháʼí calendar - Wikipedia

    en.wikipedia.org/wiki/Baháʼí_calendar

    The number of the intercalary days is determined in advance to ensure that the year ends on the day before the next vernal equinox. This results in 4 or 5 intercalary days being added. These days are inserted between the 18th and 19th months, falling around the end of February in the Gregorian calendar.