In Discord you have Time tags for things like like "Are you free at <t:unixtimestamp>?". There's a well known tool called Hammertime [1] to make it easy to create those tags and copy/paste them into place.

(I miss Hammertime sometimes daily when using Slack at work.)

We could standardize such tools. We could make them easier to use like <mylocaltime:14:00> or <mylocaltime:3/2 2pm>. We have the technology (decades of date parsing experience and date math libraries).

Will we? Probably not. Unless we did something wild like move to 15-minute timezones and force ourselves to.

[1] https://hammertime.cyou