You got me. What was the issue with March 1, 2000? FWIW, my first Y2K project was in 1983 working for the Australian Dept of Soc Sec. Family Allowance needed to be paid to children born after 31/12/1983 until their 16th birthday and the review date couldn’t be in the past.
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Replying to @adrienneleigh @fatoldduffer and
Wasn’t it actually the leap year that kept the usual rule (as opposed to 1900 and 2100)? So many systems could be set up for a leap year every four years and will be wrong in 2100...
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Replying to @davidmholtom @adrienneleigh and
I’ve found (in non-statistical samples talking to just-graduated IT people) that all know the 4 year rule, many know the 100 year rule and almost no one knows the 1000 year rule (or is it 2000? Can’t recall) It’s part of my lesson of ‘never write your own date library’
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Replying to @adrienneleigh @SQLintheWild and
Yeah it's the rule that Pope Gregory added (3 out of every 100 leap years will be made normal years) to stop the slow drifting of Easter over the centuries, because the solar year is more like 365.24 days than 365.25
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Replying to @arthur_affect @adrienneleigh and
The most interesting thing about it is that when he did it in the 1500s they were already out of sync by about ten days so as countries adopted it they had to jump forward all at once, which is a fertile image for fiction
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Replying to @adrienneleigh @SQLintheWild and
Yes, World Copyright Day was chosen to be April 23 because that's the birthday of Shakespeare and Cervantes, even though Shakespeare was actually born ten days earlier and they only "fell on the same day" because England had converted to the Gregorian calendar while Spain hadn't
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Replying to @arthur_affect @adrienneleigh and
And of course Shakespeare also died on his birthday - or did he really?
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Well really we don't actually know when his birthday was, only his christening day (April 26) Saying he was born three days earlier is a good guess that got canonized by historians because it makes it poetic that it was the same day he died
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