Symptoms

Confluence displays wrong dates for general events including page creation dates, history and comments.

Cause

Formatting and International Settings is wrongly set.

In the following example mm represents minutes so dates will be displayed in years-minutes-days resulting in 2015-54-17

Date Time Format yyyy-mm-dd HH:mm
Date Format yyyy-mm-dd

Solution

Go to General Configuration section and under Formatting and International Settings set the correct Date format.

For Numeric Month use: MM

Default formats are:

Time Format:h:mm a
Date Time Format: MMM dd, yyyy HH:mm
Date Format: MMM dd, yyyy
Long Number Format: ###############
Decimal Number Format: ###############.##########