症状

When trying to Log Work on an Issue in JIRA, the Date Started field shows a invalid date or returns an error when a valid date is entered, like this:

診断

Check the Date/Time Formats in JIRA Configuration:

• Administration > System > User Interface > Look & Feel > Date/Time Formats

Check the Advanced Settings for Date Picker and Date Format:

• Administration > System > General Configuration > Advanced Setting 
  
  

原因

Date and Time picker formats are not are not matching in JIRA's Advanced Settings.

ソリューション

1. Go to Administration > General Configuration > Advanced Setting 
2. Verify the key jira.date.picker.java.format corresponds with the key jira.date.picker.javascript.format
3. Verify the key jira.date.time.picker.java.format corresponds with the key jira.date.time.picker.javascript.format

See here for more on Configuring date picker formats