Discord now allows time markdown based on unix timestamps that shows up in the client's own timezone & supports relative times (e.g. "in 5 hours"). Example notation:
It would be great if sesh utilizes this so having to convert timezones may become a thing of the past!
Thanks for letting us know :)
Edit: Actually, these don't appear to be implemented on Discord mobile yet, but will definitely prioritize this when it's released.