#iso8601 — Public Fediverse posts

#Strava has customisable settings which let me set temperatures to Celsius and distances to kilometres.

But it doesn't let me set the date format to #ISO8601 or, indeed, anything more sensible than American weirdness. Today Strava is telling me it's June. I mean what is this 5/6/2026 rubbish.

ISO8601-based custom date format in Linux Mint

Right-click the calendar widget in the panel > toggle Use a custom date format > Add %Y-%m-%d%n%H:%M% to the field below.

Seconds omitted because I don't have use for them, and %n to put the hours and minutes in a second line, so it's easier to read.

Didn't test in other Debian-based systems. And iirc changing the locale to either Danish or Japanese also works, but then the system won't be in English.

Hope this helps someone. =)

#iso8601 @linuxmint

@mro @Dunehopper @mehdorn @radiologe @[email protected] die Unicorn-Edition ist allerdings nicht von mir, hat jemand nach meiner Vorlage gemacht 😄 #iso8601

"RFC 3339 vs ISO 8601 vs HTML"

https://ijmacd.github.io/rfc3339-iso8601/

Includes table with supported formats, a test file generator and a format checker! #iso8601 #RFC3339 #html

@hpr Agreed #iso8601 for the win.

One thing that is always annoying is how the unix datum, 1970-01-01 00:00:00 GMT was in fact 1970-01-01 01:00:00 BST in the UK the very country that invented GMT.

#utc #unixtime #time #iso8601

One thing that is always annoying is how the unix datum, 1970-01-01 00:00:00 GMT was in fact 1970-01-01 01:00:00 BST in the UK the very country that invented GMT.

#utc #unixtime #time #iso8601

One thing that is always annoying is how the unix datum, 1970-01-01 00:00:00 GMT was in fact 1970-01-01 01:00:00 BST in the UK the very country that invented GMT.

#utc #unixtime #time #iso8601

One thing that is always annoying is how the unix datum, 1970-01-01 00:00:00 GMT was in fact 1970-01-01 01:00:00 BST in the UK the very country that invented GMT.

#utc #unixtime #time #iso8601

One thing that is always annoying is how the unix datum, 1970-01-01 00:00:00 GMT was in fact 1970-01-01 01:00:00 BST in the UK the very country that invented GMT.

#utc #unixtime #time #iso8601

@billinkc Boosting for the use of the superior ISO 8601 format.
#ISO8601 #VoltaicPiles

Happy 03-14 day! #iso8601

⚠️ **Wartungsankündigung**

Heute Nacht führen wir **kurzfristig notwendige** Wartungsarbeiten durch.
Ab **2026-03-13T01:00:00+01:00** werden beide Server neu gestartet.

Es kann daher kurzzeitig zu Einschränkungen kommen.
Wir halten die Downtime so kurz wie möglich! 🛠️

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📊 Statusseite: https://status.anoxinon.de
📧 Kontakt: [email protected]

#️⃣ **Hashtags:** #Anoxinon #Wartung #AdminLife #Fediverse #ISO8601 #Mastodon #XMPP #Jabber

@allpurposemat i think en_DK does ISO dates

$ LC_ALL=en_DK.UTF-8 date
2026-03-05T14:21:53 CET

personally, i just have

LANG=en_IE.UTF-8
LC_TIME=en_DK.UTF-8

#iso8601

Ловушки времени

У программистов много проблем со временем. Сегодня речь пойдет не о time managment'е, управлении планированием и вечно горящих сроках, а о подводных камнях работы со временем при разработке ПО.

https://habr.com/ru/articles/987232/

#время #iso8601

@paulk

I'll see your Euro date format, and up the ante with the superior ISO 8601

2026-02-30

#ISO8601

I discovered that the en_SE hack for getting #iso8601 dates into #Thunderbird is no longer necessary as of version 91 (2022-10). https://support.mozilla.org/en-US/kb/customize-date-time-formats-thunderbird

My notes here: https://reboil.com/mediawiki/Thunderbird_notes#ISO_8601_via_Config_Editor

Kennards Hire you are out of your fucking minds.

d MMM YYYY format on the booking form.

YYYY-DD-MM format on the confirmation email.

I got the confirmation email and logged back in to fix the hire booking, since I assumed I'd somehow accidentally booked it for August.

Also their booking form doesn't support Firefox. Hopeless.

#iso8601

@joho

Is it true that only #Sweden and #China use #ISO8601? I forget where I heard that.

I spent a couple of years developing the #DatePicker in #JavaFX, fighting with the datetime library to parse and print dates in as many languages as possible. That was a major learning experience.

@tykling but #ISO8601 has so many nice things that aren't in #RFC3339 /o\
https://ijmacd.github.io/rfc3339-iso8601/

Happy (ISO week date) New Year!
https://chrisphan.com/posts/2025-12-29_happy_new_year.html
#iso8601 #isoweekdate #2026

TIL about date -I which gives you ISO8601 dates without faffing around with the percent sign formatting.

Plus it has a “precision” modifier which can give you the rest: date -Iseconds → 2025-12-29T10:18:20+00:00; date -Ihours → 2025-12-29T10+00:00; etc. (You can truncate the hours to h and it still works.)

Time to update about a million of my shell scripts!

#TIL #ISO8601

@RichiH OMG, the #ISO8601 Ultras! Didn't know that I NEED those! 😍
Too bad I'm 1500km further south.

I have a few stickers with me at #39c3 btw. Mainly #grafana , some #ISO8601

Find me if you want stickers

CC @c3stoc

Which version best conveys the message "ISO 8601. Every over date/time format is inferior"?
Based on different versions of the original logo I made multiple attempts. One of them will become a sticker. White on red, Blue on White or White on Blue?

EDIT: Since there was no consensus and some even tried to get me to different teams (RFC 3339, RFC 9557) I just sent an order for every version.

#iso8601 #iso8601ultras #stickerart #39c3 #infosec #stickers #bestpractice

Is there a Firefox extension to force all websites to use ISO8601? (For dates and times.)

#firefox #iso8601 #addon #firefoxaddon #extension #browserextension #firefoxextension #fedihelp

RFC 3339 vs. ISO 8601

https://ijmacd.github.io/rfc3339-iso8601/

#HackerNews #RFC3339 #ISO8601 #DateFormats #TimeStandards #TechDiscussion

Found the last #dateformat on a #sophos UTM9 in the logs. Who conceived that log format?! #iso8601 is the only acceptable format for logs.

Hmm, is PT86400S a valid ISO 8601 duration spanning a whole day?

Or should I do all the calculations to turn it into P1D ?

#ISO8601 #DateTime #Duration

Hmm, is PT86400S a valid ISO 8601 duration spanning a whole day?

Or should I do all the calculations to turn it into P1D ?

#ISO8601 #DateTime #Duration

Hmm, is PT86400S a valid ISO 8601 duration spanning a whole day?

Or should I do all the calculations to turn it into P1D ?

#ISO8601 #DateTime #Duration

I mean no disrespect, but ISO 8601 designates Monday as the first day of the week because it marks the start of the workweek. Therefore, having Sunday as the first day doesn’t make sense. #ISO8601 #MondayMotivation #WorkWeek #TimeManagement

I’ve been to the US too often and for far too long. When we returned from out trip there was a letter with in the mailbox with a date for (mandatory) water quality tests. Put it in my calendar for Friday. Well, it was today.

Date in the letter was July 4th and my brain picked it up as 7/4, ignored the send half and thought it would be July 7th. It was today, July 4th.

Hey dear friends in the US, what about making #ISO8601 #dateformat the form. In return you get to keep Fahrenheit. Deal?

@VE2UWY Is there an OS with a built-in feature that will let you do a two-line #ISO8601 date and time in the menu bar like this since a single line would be ridiculously wide?

(The point of #iStatMenus’ two-line menu bar clock is to show multiple time zones, but I thought this might be a good way to get what @randomgeek wants without taking up too much space)

/cc @sungo @bjango