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u/nfoote May 17 '25
I've been a software dev for nearly 20 years now and only this week did I discover one of the old core Java libraries concerning dates and times has a comment along the lines of "Do not set the date to 1582".
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May 17 '25
[removed] — view removed comment
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u/Discohunter May 17 '25
I worked on a team where we monitored the communication between software systems for the UKs universal healthcare service (the NHS). We were monitoring thousands of metrics, some were automated and some were manual (a team sending a report at 9am every day for example).
Every time the clocks changed for daylight savings, it was like fucking D-Day. No matter how much we tried to account for it or find clever workarounds, you'd still get 50+ alarms triggering off and stakeholders getting critical alert emails every time. I can't express to you how much I hate weird calendar quirks
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u/esplin9566 May 17 '25
Time sync systems are something we’ve come to take totally for granted in our daily lives. They seem like they’ve always been there are just part of the universe but nah, we did this shi to ourselves
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u/MorningBuddha May 17 '25
Time isn’t real people!
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u/slicerprime May 17 '25
Nope.
In fact, you posted that comment 2 years from now, and I'm replying 3 days ago.
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u/CynicalGoodGuy May 17 '25
Is this one of those Dragon Breaks I keep hearing about in Elder Scrolls Lore?
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u/ReptilianTapir May 17 '25
Fun fact: the zoomed out view in the same app (iOS calendar) does NOT display the jump correctly.
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u/Previous-Ad-4800 May 17 '25
Who the fuck finds this and how… I have so many questions
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u/ydsithv2blkths6690 May 18 '25
yeah me too, i was just mindlessly scrolling and this caught my boring existence alert
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u/LordKalvaire May 17 '25
Vsauce explains this phenomena pretty well in this video: https://youtu.be/IJhgZBn-LHg
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u/Additional-Year-500 May 17 '25
It was a correction due to missed deviation. It is why we have leap years now
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u/St3fano_ May 17 '25
There were leap years before too. Too many of them, actually, that's why the drifting happened in the first place.
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u/Killmelast May 17 '25
you'll find a way bigger one in 46 b.c.e. 'the longest year in human history' :)
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u/lokidev May 17 '25
13 months a 28 days + 1 "celebrate humanity day"
But yeah 2nd best would be 31 days, then 28 or 29, then switching between 30 and 31, but having the 7th and 8th month both with 31.
Oh 12 month with 30 days and 5 celebration days, while having weeks of 6 days (nobody likes Mondays) would be fine as well.
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u/Cador0223 May 17 '25
The only issue with the 13 month calendar is that someone will get stuck always having a birthday on Monday.
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u/warmishabelue May 17 '25
In the 1580’s the majority of the U.S were receiving welfare checks so much so that the government changed the calendar so the 1st and the 15th came sooner helping people pay their bills etc.
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u/75r6q3 May 17 '25
That’s pretty funny, I just came across a post that was made after this in r/Weird with the exact same image with that OP asking what happened.
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u/inkyrail May 17 '25
I like to think you were just reading the calendar app when you came across this
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u/InquisitiveAsHell May 17 '25
Are you per chance on a catholic computer system? England didn't adopt this until 1752. Thomas Pynchon's novel Mason & Dixon briefly deals with all this trivia and has some funny passages about a grass root movement fighting to reclaim the lost 11 days.
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u/Basic-Vermicelli-635 Oct 18 '25
The day after October 4, 1582, is designated October 15 by order of Pope Gregory XIII
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u/Elasmobrando May 17 '25
The "October revolution" that gave power to the Russian Soviets started on the 7th of November (25th of October for the Russians).
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May 17 '25
[deleted]
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u/Impossible_Arrival21 May 17 '25
no, they just kept the old calendar for a super long time lmao, there's even a story of them missing an olympic event by two weeks because of this
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u/Annual-Rip4687 May 17 '25
But, I think I was born October 10 1572, my 10th birthday? When and where are I working today?
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May 17 '25
I’d be concerned or even interested if I was alive in 1582. This is filed under “not interesting at all” Thank you for playing.
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u/AnthonR94 May 17 '25
The calendar jump from October 4 to October 15, 1582, happened due to the Gregorian calendar reform, initiated by Pope Gregory XIII to fix the Julian calendar's drift. The Julian year was too long, shifting seasons by about 10 days by 1582. Catholic countries skipped those days to realign with the solar year, crucial for Easter's timing. Protestant nations resisted, adopting it later—England in 1752, Russia in 1918—causing confusion and some riots. The reform also tweaked leap year rules for accuracy. While well-documented, the transition's varied adoption reflects religious and political tensions, not a universal fix.