Monday, April 9, 2012

Easter on April 8th

My friend Squid asked me today: when was the last time that Easter Sunday was on April 8th, and did it fall on April 8th every seven years, and did a Leap Year matter?
Oh boy, how to answer that.
Well, I said blithely, Easter can vary by over a month; it is the first Sunday after the first Full Moon after the Spring Equinox. Leap Years had nothing to do with it. That being said I double-checked my facts.
I found that Easter Sunday can fall anywhere from March 22nd to April 25th. The last time Easter was on April 8th was just a few short years ago, in 2007. But don't be fooled, Squid. The time before that was in 1928. And the next time Easter falls on April 8th, I will be dead and buried long ago.
So yes, the first Sunday after the first Full Moon after the Spring Equinox was right. Except, oh there always has to be an exception, except when that date just happens to be the date of the Jewish Passover, in which case Easter is a full week later. I didn't know that!
The Equinox, now what exactly is that? she wanted to know. Well Squid, there are two equinox dates in a year, one in March and one in September. You know that the shortest day is in late December in the North, and the longest day is in late June? Well, the Equinox is in between those two, when the day is almost exactly twelve hours and the night is almost exactly twelve hours. In fact the word Equinox means equal night in Latin. And the Equinox is also when the sunrise is directly in the east and the sunset is directly in the west. Due east and due west; it only happens on the Equinox. It's usually the 21st or 22nd of March and September. And the full moon, well we all know that the moon is at its fullest every 28 days or so the timing of Easter can vary by 28 days or more. So there you have it. It's all about the full moon when the sunrise is due East. Easter. East. Get it?
Thanks for reading
NorthStar

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