目的

Users would like the time in Jira to show in the 24 hours format rather than the 12 hours format.

ソリューション

In order to change this configuration in Jira Server/Data Center you must have the Jira System Administrator global permission. 

You may refer to this page for more information: Changing the Due Date Input Format

1. Go to the General Configuration page of your Jira instance

   • Keyboard shortcut : 'G' + 'G' + Start typing 'General Configuration' and hit Enter.
   • > System > General Configuration
   • or navigate to $JIRAURL/secure/admin/ViewApplicationProperties.jspa

   
   

2. Click on Advance Settings
   

3. To adjust the format for the DateTime picker locate jira.date.* and replace the current value with the value below respectively and click Update :

   jira.date.picker.javascript.format=%e/%b/%y
   jira.date.time.picker.javascript.format=%e/%b/%y %H:%M
   jira.date.time.picker.java.format=dd/MMM/yy HH:mm
   jira.date.picker.java.format=dd/MMM/yy

4. To adjust the format for the display on all other places, go to the Look and Feel page of your Jira instance

   • Keyboard shortcut : 'G' + 'G' + Start typing 'Look and feel' and hit Enter.
   • > System > User Interface > Look and Feel
   • or navigate to $JIRAURL/secure/admin/LookAndFeel!default.jspa

5. Locate the Time Format and replace the current value with the value below and click Update :

   HH:mm

6. Locate the Day Format and replace the current value with the value below and click Update :

   EEEE HH:mm

7. Locate the Complete Date/Time Format and replace the current value with the value below and click Update :

   dd/MMM/yy HH:mm