Please add options for ISO 8601 and 24-hour time. My regional settings are already set this way, but the flexibility of defaulting to the client's regional settings and allowing overrides to other common formats would be ideal.

This uservoice item refers to ProtonCalendar, but date and time settings should apply across the Proton suite:
https://protonmail.uservoice.com/forums/284483-feedback/suggestions/41638129-calendar-time-option-for-24-hour-format

An option under General to choose a time display default, between AM/PM and 24H formats.

+1. While I live in Australia, I would prefer the ISO format YYYY-MM-DD myself. Thanks !

This is must. American format is confusing and unproductive.

+100

+1

Allowing ProtonMail to override the browser language/region would be much appreciated.

ISO 8601 is the way.

I'm not sure that regional settings on the client are the right way to go, both for privacy reasons and because a user might need to use a different client with unfamiliar settings from time to time.

On the other hand, having the ability to set "my" default date and time format (and timezone, while we're at it) in my account settings would be a big win. (And yes, ISO 8601 should definitely be an option...)

Protonmail should at least follow regional settings configured on the client

Upvote.

24-hour clock and year-month-day

Why is this even a thing?!?! Even minor sites all over web offer choice for date/time format! This American thing is confusing and wrong way round... And, most of the world doesn't use that format! Please, change this!!!

Why is a global email service stuck on an American date format? It's very confusing especially since everything else on my computer is dd/mm/yy and 24 hr format. Is it really that hard to provide options? Apparently this has been going on for years.

It is ridiculous that this has not been fixed yet. Being stuck on the US format is a major flaw in the user experience for everyone not from the US. I know several people I have warned against using the web client because of this. If for some reason making the format fully customizable is too much of a hassle for you right now, for the love of god give us an ISO 8601 option at least.

Please change this ASAP, it's even funnier because the ProtonMail interface is now in my own language (Dutch) and we don't use AM and PM at all!

Damaging faux par re date format - why American format? 01/08 is first of August, not 8th Jan in Australia. Why no option to display by country or preference? Please do your magic PM :)

Mmm.. We're waiting for this since 2015. At least stop torturing me with am/pm time.

I vote for this: it's strange considering that it doesn't seem like an hard feature to implement, comparing to other ones.

I want his feature!! DD.MM.YYYY and 24h.

The american format confuses me, and I constantly think that I have sent emails at 8:10 and not at 20:10.
Also I just looked at another email received at the 11/8/18, which first made me think "the 11th is tomorrow", and then "I did not get this in August", till I finally realised what is happening.

Please implement this.