Pi day is an irrational holiday that was invented by Big US Date Format.
@mattblaze
We forgive it not following ISO standards because WE GET PIE!
@human3500 @mattblaze What do you mean? ISO 8601 is YYYY-MM-DD

@sn
Hmm. Maybe i was too quick with that joke.

I'll pivot and get pedantic that "." is not "-".

I'll do all this without paying ISO their extortion fee so that i can see that "." is tolerated as an alternate and I'm not 100% correct again.

@mattblaze
True, it should be celebrated on the 3rd day of the fourteenth month.
@lemonlolita
I'm gonna celebrate Pi Day 2026 on the 3rd of February 2027, in proper European fashion
@mattblaze
@ozzelot @mattblaze
Also Canadian fashion.
@mattblaze Month goes before day in ISO form too, just not legacy European forms. Just the year placement differs.
@dalias @mattblaze year month day probably works better for mechanised filing systems.
But for a human being day month year is intuitive.
@peterbrown @dalias @mattblaze It entirely depends on your native language/culture. For instance, in Hungary we do use year-month-day, and therefore I always found it more logical than any alternative.
@cobbpg @dalias @mattblaze it is undoubtedly logical but I don’t think many countries use it in common parlance

@peterbrown @dalias @mattblaze

These days we tend to say "March fourteenth" and our US written dates reflect that (3/14). In Olde Tymes we said "fourth of July" and the UK written form (4/7) reflects that. I'm not sure which changed first, though I suspect speech.

@dveditz @peterbrown @dalias @mattblaze Judging by what I hear on British television programs, `the fourteenth of March' is common parlance in the UK, so perhaps the UK form makes sense.

But it's really just what you're used to. A few years ago I nudged myself into using ISO 8601 yyyy-mm-dd (with nonstandard mm-dd without year in my own notes where the year is clear from context). It now feels natural to me, much more so than any of the xx/yy forms.

@peterbrown @dalias @mattblaze Not for this human being.

Do you also argue that armpit-and-brine-defined Fahrenheit is more intuitive than Celsius? I used the first for 30 years, now live with the second, and it's fine.

People often think something is intuitive and better just because it's what they're used to.

@oclsc @dalias @mattblaze I was brought up on the tail end of Fahrenheit but I prefer Celsius, like I think probably the vast majority of the UK. That are still a few old folks that feel more comfortable with Fahrenheit but every year there are fewer of them!!
Washington's Dream - SNL

YouTube
@peterbrown @dalias @mattblaze "But for a human being, second-minute-hour is intuitive" :)

@phl @dalias @mattblaze good point. But if you’re describing an event the time goes first and then the day then the month then the year. When it all fails of course is when you introduce the seconds elapsed and it goes minutes & seconds

But on mm dd yy the *only* country to use it is the USA.
Like gallons.

@peterbrown @dalias @mattblaze mm-dd is also the order of things in Hungary, Korea, Japan, China. yyyy-mm-dd to be precise, but listing mm-dd in the orderly and not backwards way is not at all a fringe American thing :D

And again, strangely, nobody seems to demand that minutes come forward or ounces before pounds and stones, or what have you, but *somehow* dd-mm is "just the way humans think" (it isn't, it's all just cultural, and as such it can be both popular and wrong at the same time).

@phl @peterbrown @mattblaze yyyy-mm-dd is just ISO form, which is what everyone *should* be using 😁
@dalias @phl @mattblaze yes, well momentarily *should* mean for a brief moment not “in a moment for eternity”.
And let’s not even go near trunk and gas.

@dalias @phl @mattblaze and I think most western European languages follow the DD MM YYYY format.

When it comes to standardisation, it would be good.
Then passenger airliners wouldn’t get halfway across the Atlantic and run out of fuel because they thought they were refuelling in kilos not pounds.

@mattblaze that's all fine and well but the important question is, what pie are you having?
#ShepardsPie here
@mattblaze I find it transcendental.
@mattblaze Are you saying we should celebrate Duodecember the Third instead?
@mattblaze The rest of the world shoud start celebrating Pi Day on July 22nd.
@mattblaze arithmetical imperialism
@mattblaze
Europeans can keep waiting for April 31 to happen
@mattblaze
format will clean your hard drive, but if that's your Big Date you'll be left feeling empty.
@mattblaze unfortunately there's no third of Duodecember (3/14)

@mxchara @mattblaze there's a 22nd of July though (22/7)

https://wok.oblomov.eu/mathesis/pi-day/

Pi Day

Why March 14 (Einstein's birthday) is the wrong day to celebrate π, the mathematical constant

wok
@mattblaze Pi day has been ratio’d to death…
@mattblaze There is no 31/4.
@mattblaze Why you pooh-pooh pi?
@mattblaze It may be irrational, but it's also transcendental.
@mattblaze
what about YYYY-MM-DD
@mattblaze 22nd July for the win. It’s a better approximation too.