All Devices How Apple dealt with Gregorian Calendar. What a mess!

[Jumpie]

So I was watching a video on YouTube from Vsauce on How the Earth Moves and it was talking about the Julian vs Gregorian calendars. So it got me thinking: how did Apple deal with this? They really didn't. In 299 they removed January through March.

In 1579-1580, February had 31 days. March had 30. April and June had 31. August had 30. They removed October.

In 1581, January had 28 days. February had 31. March had 30. April had 31. May had 30. June had 31. August had 30. September had 31. And October didn't exist.
Everything went back to normal in 1582.

I tried to put a video of it Here too.

I might've had too much time on my hands.

 

[cmaier]

So I was watching a video on YouTube from Vsauce on How the Earth Moves and it was talking about the Julian vs Gregorian calendars. So it got me thinking: how did Apple deal with this? They really didn't. In 299 they removed January through March.

In 1579-1580, February had 31 days. March had 30. April and June had 31. August had 30. They removed October.

In 1581, January had 28 days. February had 31. March had 30. April had 31. May had 30. June had 31. August had 30. September had 31. And October didn't exist.
Everything went back to normal in 1582.

I tried to put a video of it Here too.

I might've had too much time on my hands.

Shoot. That explains why my iPhone made me miss my my October 3, 1579 appointment with my leach-healer.

 

[Itinj24]

 

[bbednarz]

The question has to be asked.... Who cares?

 

[cmaier]

The question has to be asked.... Who cares?

It reminds me of this:

 

[Mr_Brightside_@]

This Would Never Have Happened Under Steve Jobs!

 

[Jumpie]

The question has to be asked.... Who cares?

not that anyone cares. I just found it quite interesting. That’s all

 

[stephenschimpf]

So I was watching a video on YouTube from Vsauce on How the Earth Moves and it was talking about the Julian vs Gregorian calendars. So it got me thinking: how did Apple deal with this? They really didn't. In 299 they removed January through March.

In 1579-1580, February had 31 days. March had 30. April and June had 31. August had 30. They removed October.

In 1581, January had 28 days. February had 31. March had 30. April had 31. May had 30. June had 31. August had 30. September had 31. And October didn't exist.
Everything went back to normal in 1582.

I tried to put a video of it Here too.

I might've had too much time on my hands.

Sorry, but this isn't true. The transition from the Julian calendar to the Gregorian calendar happened when October 4, 1582 was followed by October 15, 1582. Nobody removed October. Only 11 days were skipped to bring the calendar back in line with astronomical reality, and the leap year rules were changes to prevent this from happening in the future.

Also, this was done by Papal bull so only applied in the Catholic countries. America, as a British colony, didn't switch over until 1752, and Sweden not until the following year, and by then they had to remove more than just 11 days.
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The question has to be asked.... Who cares?

As someone who writes astronomy software, I certainly care.

 

[EM2013]

I bet OP woke up like “WHAT YEAR IS IT!?”

 

[reycat]

So I was watching a video on YouTube from Vsauce on How the Earth Moves and it was talking about the Julian vs Gregorian calendars. So it got me thinking: how did Apple deal with this? They really didn't. In 299 they removed January through March.

I find this kind of things really interesting. For example, Russia’s October Revolution was actually in November in the rest of the world.

And Shakespeare and Cervantes died on the same date, April 23, 1616 but not on the same day because Spain was using the Gregorian calendar and England hadn’t made the switch yet.

 

[DeepIn2U]

What about the number 23?

 

[BrianBaughn]

As someone who writes astronomy software, I certainly care.

Pope Gregory wasn't a big fan of science. He probably would have put your astronomy apps on the Index Softwarum Prohibitorum.

 

[jdiamond]

not that anyone cares. I just found it quite interesting. That’s all

Jumpie, this is awesome! One of the coolest things I've seen about iOS in a long, long time. It's so weird that they did anything differently at all, yet came up with something so bizarre.

 

[jdiamond]

Sorry, but this isn't true. The transition from the Julian calendar to the Gregorian calendar happened when October 4, 1582 was followed by October 15, 1582. Nobody removed October.
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I believe he's pointing out that APPLE removed October, and that none of Apple's other adjustments are true, either. But it's so bizarre you have to wonder what's really going on there. Maybe you're right and this has nothing to do with the Julian Calendar, but rather, merely exposed an unrelated bug in Apple's date function?

To the people who say "who cares" - now you have a reason, because if we don't understand how Apple's date logic is broken, how do we know the year 2021 won't suddenly disappear from the calendar? (And to the rest of us, this is just really, really cool!)

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BTW, I'd take that joke about "Steve Jobs would never have let this happen" more seriously - even though it has no practical use, it's just a bit sad that whomever developed the date function (and we're not talking a ton of code here) didn't have the pride to do that little extra mile and make it work all the way back. That would be like an Easter Egg of sorts. Or bothering to paint the back side of a bookshelf.

 

[doubletap]

imagine if the folks at Apple were kind enough to have entries where the dates are missing that explained their reasoning
Like:
This space intentionally left blank
or
Deleted due to calendar alignment

 

[badatusernames]

This is a fun thread lol. However, as I am sure most know all calendars are technically arbitrary in some cases (you need to make certain assumptions when doing a calendar).

 

[dwig]

...Also, this was done by Papal bull so only applied in the Catholic countries. America, as a British colony, didn't switch over until 1752, ...

... and it should be noted that "America" means the area of the 13 colonies and the Canadian colonies. Those North American territories under rule by other European nations changed calendars when their parent country did. The oddest is perhaps Alaska which had to adapt to both a Julian-to-Gregorian shift and a moved International Dateline when sold by Russia (Julian) to the US (Gregorian). The calendar difference was 12 days at the time but the dates only changed by 11 as the dateline moved and they repeated that named day.

Anyway, we don't use the original Gregorian calander in its exact form these days. The leap-n have changed somewhat with the addition of leap-seconds to improve accuracy. Originally, there were leap-years (extra day every 4), leap-leap-years (skipping the extra leap day every 100 years, e.g. 1700, 1800, 1900), and leap-leap-leap-years (skipping the skipping of the leap day every 1000 years, e.g. 2000). The "new Gregorian" adds leap-seconds occasionally (every 6 months if needed) to fine tune the calendar and correct for irregularities in the year length.
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[Jumpie]

Jumpie, this is awesome! One of the coolest things I've seen about iOS in a long, long time. It's so weird that they did anything differently at all, yet came up with something so bizarre.

thanks. Maybe it’s not about Gregorian vs Julian but it’s still quite interesting. It was the beat title I could think of at the time.