JIRA Invalid Date or Time Displayed Within 'Work Log' in Activity Panel of Issue
Platform Notice: Cloud Only - This article only applies to Atlassian products on the cloud platform.
Symptoms
In JIRA when reviewing the Activity panel for an issue with logged time an invalid date is displayed:

Cause
JIRA Cloud 'Look and Feel' allows customization of 'Date/Time Formats'. There are additional configuration items available for JIRA installed: Invalid date when trying to Log Work in Jira Data Center
Resolution
Cog icon > System - User Interface > Look and Feel
Bottom of the page has 'Date/Time Formats'
Select 'Revert' to restore the previous settings or
Edit the settings to match the Simple Date Link
ℹ️ info is good
Updated on April 8, 2025
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