How to set Monday as first day of week in Date Picker calendar
Platform Notice: Data Center Only - This article only applies to Atlassian products on the Data Center platform.
Note that this KB was created for the Data Center version of the product. Data Center KBs for non-Data-Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
Summary
Overview
This article will explain how to change the Date Picker calendar to set Monday as the first day of the week.
Environment
Jira Data Center on any version from 9.0.0.
Solution
To show Monday as first day of the week, please do the following:
Go to Administration > System > User Interface > Look and Feel.
Scroll under "Date/Time Formats" section.
Look for UseISO8601 standard in Date Picker and check the checkbox. You might need to click on the Yes/No to be able to see the checkbox.
Update the field value.
Known limitation to this solution
This affects all users. It's currently not possible to make this change on a per-user basis.
There's a suggestion for it: JRASERVER-10613 - Capability to customize date/time format per user
Known Issue
If you find that enabling the ISO8601 option does not change the date/time format and Sunday is still displayed as he first day of the week, you may be impacted by the bug below, which impacts Jira versions that are lower than 9.0.0 (This bug was fixed in Jira 9.0.0): JSWSERVER-7238 - JIRA Agile/Software does not respect JIRA's ISO8601 setting
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