Ironically I'm having the opposite issue: American getting the global format.

Also see this more general localization idea: https://protonmail.uservoice.com/forums/932839-proton-drive/suggestions/50795321-location-settings-for-sheets-date-numbers-curr
Also covers numbers/currency.

Totally agree. As a European, my brain doesn't compute the month-day-year format we're stuck with now.

Yeah unusable without this feature, also need to not default to USD

Need that feature too. Not usable without german date formatting. (dd.mm.yyyy)

This, plus date using dots instead of slashes, with the full month number instead of dd/m/yyyy when the month is a single digit!

Also, more options for other formats such as numbers – it's absurd to force the American comma as thousand separator and dot as decimal separator. I'm not going to use this until different formats are available.

it is quite embarrassing for a Swiss company to select the US date format and make it non-modifiable. None of us wants to read a date with the month first. At first I though the sheet would use my browser or system region but even with everything in French or UK English I still have the dates in MM/DD/YYYY. It's a no go to use Proton Sheets for me.

I always use YYYY-MM-DD, it's the easiest way for me and easiest to sort. I have it in all my documents

This feature is super important for me. I'm migrating from google as a Proton paying customer.

yeah. at least ISO-standard date formats should be supported.

I am flabbergasted Proton Sheets launched without such a basic and essential feature... and then even defaults to the US date format even though being an european service. Since Proton Docs was released, I was hoping for a Proton Sheets so I could finally leave Google Docs behind. When that finally happened, I was over the moon... but in its current state, it is simply not able to compete with or be a replacement for Google Docs Sheets. :-(

Hopefully the date and time format gets as customizable as it is with Google Docs. That would be a great step forward.

DD/MM/YYYY is my favorite, and it is not easy to convert with formulae.

Agreed that we should be able to specify this manually, but Sheets should pick up the default from the browser environment like any other application.

There should be an option to provide a date format.

I need YYYY-MM-DD, which is easy to enter myself if given the option.

When importing an existent spreadsheet that I created with Google Drive, I was able to use cells with DD/MM/YYYY. It was recognized as a date field. But indeed it is necessary to have more formats.

💯 I imagine date formatting will quickly become an issue for this global audience.

And dd.mm.yyyy (used for example in the Czech Republic) would be great.