Overview

This article will explain how to change the Date Picker calendar to set Monday as the first day of the week.

Solution

To show Monday as first day of the week, please do the following:

1. Go to Administration > System > User Interface > Look and Feel.
2. Scroll under "Date/Time Formats" section.
3. Look for Use ISO8601 standard in Date Picker and check the checkbox. You might need to click on the Yes/No to be able to see the checkbox.
4. Update the field value.

Known Issue

Workaround

 The following workaround has been shown to work for customers on 8.13.x versions, but may not work on all versions of JIRA.

 Please test these changes in a lower environment before attempting them in your production environment.

1. Choose Administration (     ) > System. 
2. Select User Interface > Announcement banner in the System panel below.

3. Add the following code snippet into the Announcement field:

   <script>
   (function() {
       if (Calendar) {
           Calendar._setup = Calendar.setup;       
           Calendar.setup = function(arguments) {
               arguments = arguments || {};
               arguments.useISO8601WeekNumbers =true;
               Calendar._setup(arguments); 
           };
       }
   })();
   </script>

4. Select the required Visibility Level for the banner.
5. Click the Set Banner button.