YYYY-MM-DD gang rise up!
this post was submitted on 01 Sep 2025
373 points (85.7% liked)
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ISO 8601. This is the way.
For naming in file names yes.
For every mention of any date ever.
Even when talking to your friends.
When's your birthday?
2025-11-23
For naming the person your dating no
Any answer other than ISO 8601 is a red flag
RFC 3339 has less ambiguities, see https://ijmacd.github.io/rfc3339-iso8601/
Sure, but that's also iso8601:
This document defines a date and time format for use in Internet protocols that is a profile of the ISO 8601 standard
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Yeah, I prefer a space or underscore instead of the T, much easier to read.
!rfc3339@programming.dev
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YYYY-MM-DD
:hh:mm:ss optional
I agree. What is the point of dating things if they aren't in order when done.
YYYY/MM/DD is good for file locating in a single folder.
This is the way
this is the way
This iso the way
And YYYY-MM-DD if you're all in one level because there are far fewer files.
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ISO 8601 is the only true answer.
She must hate that he doesn't prefer YYYY/MM/DD
I don't like the slashes, as hand written they can appear as a 1.
Edit: also slashes mess with file names, gotta use escape characters
YYYY-MM-DD for electronic sorting.
DD-MMM-YYYY for everything else.
Edited to add: it is wild to me that people downvote someone else's opinion about something so mundane.
I think using three digits for the month is a bit confusing. :)
I don't like DD-MM-YYYY. I think it should be DD.MM.YYYY. This way you can distinguish between the date formats in those cases where people only use two digits for the year. Hyphen as a seperator means year in front, a dot means year at the end. And a slash implies the bad format.
I usually see MMM as an indicator for the three letter month abbreviation, useful for when humans are reading it (since it makes it all that much more difficult to misinterpret)
useful for when humans are reading it
I was sharing a meme about how absurd our time-related names are: days of the week named after the sun, then the moon, then a bunch of Nordic gods, and then the Roman god Saturn, and then months named after some Roman gods, then some Roman leaders, then some numbers that don't actually correspond to their placement in our calendars.
And my Chinese coworker was like "dude that's why our days of the week and months of the year are just the numbers, where January is something like 'month one' and Monday is something like 'day one.'" Seems like a good system to me, honestly.
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MMM is a three letter abbreviation, like Jan or Mar or Sep.
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RED FLAG! RED FLAG!!!
YYYY.MM.DD_HH24MI.SS
e.g.
2025.09.02_1830.33
you know EXACTLY when the timestamp is referring to.
remove the time part you still got a pretty clean date 2025.09.02 which is also computer sort friendly.
the only missing component is the Timezone which I find pretty stupid TBH, because as a big Space Sci-fi fan, there needs to be a universal timecode system which is universal in the literal sense. Well technically it can never be, relativity and all, but you get what I mean..
also while we are at it, we should start teaching kids 12 digit number system, so that we get rid of the pesky decimal with a more efficient duodecimal.
Oooh, and make year 13 months with each month exactly 28 days, and the fractional remainder at the end of solar cycle is just a blackout timescape that nobody acknowledges collectively throughout the world.
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annnnnnnd that's enough lemmy for the day
The only correct answer is Unix timestamps.
!rfc3339@programming.dev
I'm afraid you're date is incompatible with mine. I prefer the number of seconds since 1970-01-01 00:00:00 UTC stored in a 64 bit signed int.
I prefer %a, %d %b %Y %T %Z because of legacy support
>>> time.strftime("%a, %d %b %Y %T %Z")
'Tue, 02 Sep 2025 14:06:16 GMT'
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