12 April 2017

Finding Easter: How do they come up with a date?


I will not give a long introduction to make this post as brief as possible, but I am sure there are people who still wonder how in the world do they know when the Holy Week is in a year.

I am no legit scientist to talk about deep concepts, but I really want to share my knowledge on how to find Easter in a much simpler way.


Instructions.
1. Look for the full moon in the month of March.
2. If the full moon falls before 21 March, discard it and look for the next full moon which is in the month of April.
3. If the full moon falls on 21 March or after that, then let's make it our date of reference (They call it "Paschal Full Moon").
4. The Easter is the SUNDAY AFTER THE PASCHAL FULL MOON.
5. Additionally, the Thursday and Friday before the Easter are what we call Maundy Thursday and Good Friday, respectively.

Examples.
For the year 2016, we find the full moon on 23 March, Wednesday. Easter Sunday comes after the full moon. So, 27 March 2016 is Easter Sunday.

For the year 2017, the full moon falls on 11 April, which is a Tuesday. The Sunday after the Paschal Full Moon is the Easter. Therefore, the Easter Sunday for 2017 is 16 April.

For 2018, 31 March is the Paschal Full Moon, a Saturday. So, we find 1 April as 2018's Easter Sunday.

Earliest and Latest Easters on Record.
According to credible calculations, the earliest Easter on record is 22 March, which happened in year 1818. We may not live to see the next earliest Easter, which will be on year 2285.

However, we've just had the second earliest Easter last 23 March 2008.

Meanwhile, the latest Easter on record is 25 April. Our ancestors had it celebrated in year 1943 (or had they, considering World War II). Don't fret for the next time Easter falls on 25 April will be on year 2038.

The Easter is that late for year 2038 because 20 March, though will witness a full moon, is not that year's Paschal Full Moon for it comes before 21 March (the vernal equinox) so it is not counted. The next full moon is 19 April (Monday), undeniably the Paschal Full Moon. Remember the general rule: Easter Sunday comes after the Paschal Full Moon. Hence the date.

Source: Wikipedia
(Don't worry, their info about this is reliable.)

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