Hi @Owen Based on your requirement there are two changes need to be made to show the time in 24 Hr format and to show the relative date instead of 1 day ago, 3 days ago, "Today" or "Yesterday", etc
The below KB to update the Time format to 24 Hr
https://confluence.atlassian.com/jirakb/change-the-time-format-to-24-hours-in-jira-734234435.html
This KB is to display a relative dates, this will require a Jira node restart as this is change on the back end file.
https://confluence.atlassian.com/jirakb/display-standard-dates-in-jira-server-414187622.html
Perform the changes on the lower instances and test before making the changes on the production.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.