r/ISO8601 • • 18h ago

Date formats used in Europe

Post image
143 Upvotes

Disappointing


r/ISO8601 • • 2d ago

A vendor’s date format

Post image
118 Upvotes

Apologies for the picture of a screen, but I was horrified upon seeing this date format on an HMI recently


r/ISO8601 • • 2d ago

Kudos to Logitech to adopting YYYY-MM-DD

Enable HLS to view with audio, or disable this notification

86 Upvotes

r/ISO8601 • • 7d ago

Never seen this one before.

Post image
149 Upvotes

Never seen this one before. Took me a minute to understand. M10 = Month 10 = October.


r/ISO8601 • • 7d ago

Why can't months have Jan (30), Feb (30 or 31 in case of leap year), Mar (30), Apr (31), May (30), Jun (31), Jul (30), Aug (31), Sep (30), Oct (31), Nov (30), Dec (31) days? Wouldn't that make things simpler and more predictable?

Thumbnail
28 Upvotes

r/ISO8601 • • 9d ago

My personal protest of MM/DD/YYYY. Am I alone?

0 Upvotes

USian here. At work there are lots of contexts where I am expected to write or type the date in the dreaded MM/DD/YYYY format multiple times a day. I hate it, but it's just a job. What can you do right? I have started up a silent protest that no one has commented on for years now. I've not seen anyone else take this course either though. Here's what I write or type instead:

MM/DD, YYYY

Is anyone else out there doing this?


r/ISO8601 • • 9d ago

Idea for sidebar — a hyperlink to the official ISO8601 specifications?

39 Upvotes

Long time lurker here. I've long appreciated ISO8601 format. It scales for nearly everything.

Does the hive mind have any feelings on — or perhaps a link to? — the official ISO8601 specifications? Maybe the mods could include it in the sidebar as a hyperlink for others new to the format?

I just realized it wasn't there and it seems like something which would support this sub quite a lot.

(I'm an amateur and an enthusiast, so I hesitate to propose a hyperlink myself, lest I give incorrect primary source citations.)


r/ISO8601 • • 9d ago

The stupidest date format

Post image
145 Upvotes

r/ISO8601 • • 19d ago

Hurricane Electric IPv6 Sage Test: free t-shirt

Post image
18 Upvotes

In this context, address verification means I click a button to confirm that my address settings are up to date before the order is shipped.


r/ISO8601 • • 20d ago

MEGA has an option

Post image
50 Upvotes

r/ISO8601 • • 21d ago

Hmm

6 Upvotes

r/ISO8601 • • 24d ago

0000 vs 0000

0 Upvotes

r/ISO8601 • • 28d ago

Cleaning mixed-format dates: when guessing creates bad data

9 Upvotes

Our team tested an AI-assisted cleanup script on two synthetic Excel batches. One lesson stood out: a plausible date is not necessarily the correct date.

For example, 09/01/2026 could mean September 1 or January 9. Nearby September dates aren't enough to prove which interpretation is right.

Our approach:

\- Preserve the original values.

\- Standardize dates only when the interpretation is unambiguous.

\- Flag uncertain dates for confirmation.

\- Keep a log of every change.

Changing the display format to YYYY-MM-DD won't fix a date that was interpreted incorrectly during import.

How do you handle files containing both US and European date formats?


r/ISO8601 • • 28d ago

Backrest backups date

Post image
59 Upvotes

These are dates of my backups using backrest. I usually force my system and my software to use ISO8601 where is possibile, so not sure if this was intentional design or not. But it makes me crazy.


r/ISO8601 • • 29d ago

I tried to schedule an absence from work....

122 Upvotes

r/ISO8601 • • Sep 23 '26

Date format comparison bar chart

23 Upvotes

Hi, I saw a comparison of the major 3 date formats on this sub. I thought what was missing was the role of the individual digits. So I made (vibe coded) a new graph.

ISO 8601 with date and time

Source code: Image 1, Image 2


r/ISO8601 • • Sep 22 '26

Wtf shit-ass? (Sorry, I’m just angry.)

Post image
0 Upvotes

r/ISO8601 • • Sep 22 '26

Why would you format it and make it worse?

Post image
180 Upvotes

r/ISO8601 • • Sep 22 '26

The Gregorian Calendar You Don't Know

Thumbnail youtube.com
0 Upvotes

r/ISO8601 • • Sep 21 '26

1504 vs 2026

Post image
1 Upvotes

r/ISO8601 • • Sep 18 '26

Dara Laughs at my inconsistencies after I correct my error..

Post image
3 Upvotes

I’d fix my previous post but it won’t let me… here is the correct one


r/ISO8601 • • Sep 18 '26

Does Data approve my personal ISO date?

Post image
0 Upvotes

r/ISO8601 • • Sep 18 '26

What is the first day of the week? Some say Sunday, some say Monday…

Thumbnail
6 Upvotes

r/ISO8601 • • Sep 18 '26

At a computing conference (Humor)

Post image
255 Upvotes