Let the user configure output time format

[Martoon-00]

Clarification and motivation

Some users like 24-clock format, some prefer am/pm abbreviations, we should make this configurable on per-user basis if that's possible.

Also, let's thoroughly choose what should be the default.

Acceptance criteria

• The time format in translated time is made configurable.

[Martoon-00]

Note, that if we start keeping per-user information, we can also improve our tips. Instead of making tips appear at random, show them for the first few times, and maybe once per several months after that.

[dcastro]

I'd also note that this would mean keeping this data persisted in a database, which we haven't had the need for so far.

I wonder if this information can already be retrieved via the Slack API 🤔 Is Slack itself aware of the user's preference regarding clock formats, and can we ask them for that information?

[dcastro]

Update: Haven't looked too deep into this, but we may be able to achieve this with Block Kit elements: https://api.slack.com/reference/surfaces/formatting#date-formatting

Specifically, using the <!date> command:

{time} is displayed as 6:39 AM or 6:39 PM in 12-hour format. If the client is set to show 24-hour format, it is displayed as 06:39 or 18:39.

[dcastro]

Here's an example using Block Kits:

https://app.slack.com/block-kit-builder/T09C3TRRD#%7B%22blocks%22:%5B%7B%22type%22:%22section%22,%22text%22:%7B%22type%22:%22mrkdwn%22,%22text%22:%22%3C!date%5E1392734382%5EPosted%20%7Bdate_num%7D%20%7Btime%7D%7CFallback%20text%20for%20older%20Slack%20clients%20goes%20here%3E%22%7D%7D%5D%7D