Allow users to configure their locale and provide a default date format based on locale

[thelooter]

Currently, dates are presented as mm/dd/yyyy.
This is not intuitive for many people, and has lead to multiple wrong entries for me.
Having the ability to configure how you want the date to be presented would be really helpful

[claudey]

This is an interesting problem I may want to solve.

[thelooter]

I probably should have mentioned that before, but I would to use dd/mm/yyy notation

[zachgoll]

I think @vsme had a good start to this in #889. While we cannot accept bulk translations right now, I think this would be a good opportunity for us to configure the ability for users to set their preferred locale.

Since date formats are set once for locale, this would be a small enough scope for us to introduce without adding much overhead.

The requirements should probably be something like:

• User should be able to set their preferred date format, and app respects this setting
• User should be able to set their preferred language (disable for now, but we could have a placeholder in the UI with a "coming soon")

I think we'll want to set the locale via the strategy outlined here:

https://edgeguides.rubyonrails.org/i18n.html#setting-the-locale-from-user-preferences

@justinfar do we have some designs for this that we could post on this issue?

[justinfar]

On it!

[justinfar]

Just added a page in the community file

Here's how it's looking:

I've basically just added a Soon tag (that we use within the Security page) within the language field and added the Date format field with 5 of the most common date formats.

[zachgoll]

@justinfar looks good to me!

This issue is up for grabs for anyone who wants to tackle it. Otherwise I'll circle back and knock it out after some of the investment portfolio work I'm doing.

[thelooter]

Another idea would be still activating the locale selection with a note next to it stating that it only applies to dates for now. This would already put the data in a model that can easily be applied to other things. That way you could gradually add more places to use it, like the date or the default suggested Currency

But i dont know enough about the codebase to judge if this is a viable solution