Discord has a feature called “Timestamps”. With this feature, your post will adjust time dynamically based on a user’s local time.
You can convert time to the Discord timestamp using the following link: https://r.3v.fi/discord-timestamps/
Interface
The big number in brackets is Unix Timestamp — format used in programming. It is the number of seconds passed from January 1st of, 1970. You can also use this time converter.