When swiping from the right of the screen, a tile appears with the time, date, battery icon and wifi icon. After customizing the date and time format in "Calendar settings", the new time format is displayed correctly, but not the date format. The legacy
taskbar time/date are fine.
If you want to leave feedback on the issue you are experiencing, go to thread listed below and use the instructions from BillFill's post on Wednesday, September 14,
2011 8:27 PM and use the Connect website to give feedback on this issue. Bill's thread has a code to use on the Connect website.