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However, in the Gregorian Calendar, this is April 3. The first Orthodox Full Moon after the Equinox falls on (Julian) Tuesday, April 2, 2014 (Gregorian April 15). The following Sunday, (Julian) April 7, is, therefore, Easter Day (Gregorian April 20). Range of dates for Western and Orthodox Easter
The range of days considered for the full moon to determine Easter are 21 March (the day of the ecclesiastical equinox of spring) to 18 April—a 29-day range. However, in the mod 30 arithmetic of variable d and constant M , both of which can have integer values in the range 0 to 29, the range is 30.
A solar equinox is a moment in time when the Sun crosses the Earth's equator, which is to say, appears directly above the equator, rather than north or south of the equator. On the day of the equinox, the Sun appears to rise "due east" and set "due west". This occurs twice each year, around 20 March and 23 September. [a]
The equation of time is obtained from a published table, or a graph. For dates in the past such tables are produced from historical measurements, or by calculation; for future dates, of course, tables can only be calculated. In devices such as computer-controlled heliostats the computer is often programmed to calculate the equation of time.
The autumnal equinox 2018 will land on September 22, which is only two and a half weeks away at this point. The day, also known as the September equinox, is the moment in which the Sun appears to ...
Changing the standard equinox and epoch. To calculate the visibility of a celestial object for an observer at a specific time and place on the Earth, the coordinates of the object are needed relative to a coordinate system of the current date. If coordinates relative to some other date are used, then that will cause errors in the results.
The March equinox [7] [8] or northward equinox [9] is the equinox on the Earth when the subsolar point appears to leave the Southern Hemisphere and cross the celestial equator, heading northward as seen from Earth. The March equinox is known as the vernal equinox (spring equinox) in the Northern Hemisphere and as the autumnal equinox (autumn ...
The paschal full moon is the ecclesiastical full moon of the northern spring and is used in the determination of the date of Easter. The name "paschal" is derived from "Pascha", a transliteration of the Aramaic word meaning Passover. The date of Easter is determined as the first Sunday after the "paschal full moon" that falls on or after March 21.