GNOME Bugzilla – Bug 742354
Double week number.
Last modified: 2015-01-05 21:01:55 UTC
Created attachment 293731 [details]
Shows the week bug, marked with red.
It marks two weeks with week number 13 and displays all the rest weeks wrong.
See the attachment.
You did not specify the version, but I'm pretty sure this was fixed in bug 736722 - the patch in question is on the gnome-3-14 branch, but didn't make it to a stable release so far ...
*** This bug has been marked as a duplicate of bug 736722 ***