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A summary of the international standard date and time notation (2004) (cam.ac.uk)
29 points by Tomte on Feb 28, 2022 | hide | past | favorite | 5 comments



"The 24h time notation specified here has already been the de-facto standard all over the world in written language for decades. The _only_ exception are a few English speaking countries, where still notations with hours between 1 and 12 and additions like “a.m.” and “p.m.” are in wide use."

Wierd fact : some African countries close to the equator have time from 0 - 12 as the hours of daylight. 02:00 is what most people represent as 08:00

If something states a train leaves at 02:00, ask what that means. Iso is not ambiguous, but be careful not to miss the train until we have world wide adoption.

Technically "The only exception are a few English speaking countries" is incorrect.


Interesting. I believe there's an Arab (or Islamic, I'm not sure which) system of using sunrise/set as 0h as well. Possibly related.


Japan also uses a 12 hour clock with 午前 being morning or a.m and 午後 being afternoon p.m.


A page without cookie pop-ups! Congratulations. Cookie pop-ups are only required if cookies are used for tracking or targeted advertising. Cookies for session maintenance don't need pop-ups. The number of sites that have pop-ups with por ux and then don't set a cookie to record the notice has been read, and show the popups repeatedly is crazy. I have left sites with poor cookie ux.


Back in the first-to-invent days of U.S. patent law, lawyers and lab notebook guidelines used to recommend the "6 February 2021" format as unambiguous.




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