Dating 1st base

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The present method describing the Easter Dating Procedure can be found in Christian Prayer Books.

This procedure has been dramatically simplified by Ronald W. See Finding Easter Sunday Dates with a Calculator for a clear and unique explanation of this procedure.

There are three steps to calculating the Easter Sunday date: Find the Easter Sunday date from Table E Table A below shows PFM dates for years 326 to 2599 A. If you're looking further into the future, click here to see another Table A for years 2600 to 4099 A. Use the total result from step 2 to find the day of week of the PFM date in Table E, then add the number of days shown to the PFM date to find the Easter Sunday date.

For example, year 2285 gave us a PFM date of March 21, and step 2 gave us a total result of 6.

The Julian calendar date Thursday October 4, 1582 was followed by the Gregorian calendar date Friday October 15, 1582. Consequently, their Easter Sunday dates are identical up to 1582, then from 1583 onwards often differ from those of Western churches.

In some years the Orthodox Easter Sunday occurs on the same day as the Western Easter Sunday.

Despite frequent references to March 21, this date has no special significance to any recent Easter dating methods.Looking at Table E, this 6 shows that this PFM date occurs on a Saturday, so we need to add 1 day to find the next Sunday, which is March 22, the Easter Sunday date for the year 2285 A. Other examples: Julian calendar example: Year 887: Step 1: PFM=A12, Step 2: 3 4 3 = 10, Step 3: A12 4 = April 16, 887 Gregorian calendar examples: Year 1987: Step 1: PFM=A13, Step 2: 4 1 3 = 8, Step 3: A13 6 = April 19, 1987 Year 2987: Step 1: PFM=A4, Step 2: 2 5 3=10, Step 3: A4 4 = April 8, 2987 Year 3987: Step 1: PFM=M27, Step 2: 1 1 3=5, Step 3: M27 2 = March 29, 3987 INDEX This accurate procedure applies to Orthodox churches, which always base their calculations on the Julian calendar and the "19 PFM dates" table. D., and takes no account whatsoever of the changes resulting from the introduction of the Gregorian calendar in 1582. These instructions show the procedure for years 1054 to 3399 A. However, this simple method continues indefinitely, because the Julian calendar always has a February 29 date in every fourth year.There are four steps to calculating the Orthodox Easter Sunday date: Use the total result from step 2 to find the day of week of the PFM date in Table E, then add the number of days shown to the PFM date to find the Julian calendar Easter Sunday date.ENGLAND used the Julian calendar until 1752, so its Easter Sunday dates are obtained by using steps 1, 2 and 3 (but not 4) of the Orthodox Method stated here. From 1753 England adopted the (revised) PFM Gregorian dates Table A and subsequent tables used in the calculations above.For example, English Easter Sunday date for 1750 A. The Gregorian calendar omits certain February 29 dates to keep its dates aligned with the seasons and position of Earth in relation to the Sun.

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