GNOME Bugzilla – Bug 645618
Weird date format in localised calendar
Last modified: 2015-06-07 03:21:25 UTC
The date format used in the calendar popup in the top menu seems to be hard-coded to a US date format, despite the day and week names being translated. This looks quite odd in locales such as in Swedish where the date get displayed like: "Onsdag Mars 23, 2011", whereas a correct rendering would be "Onsdag 23 mars, 2011" (note the lower-case month name (but this might be a translation issue).
The Swedish translation has not been updated since December 31, so there are many untranslated strings, including that clock format string. (The older clock format strings are translated, which is why it appears correctly in the top bar, just not in the popup calendar.)
gnome-shell is now translated to Swedish in 100%, including the date formats.