When an instructor sets Date/Time restrictions on a content item or announcement, the dates are not being displayed correctly in the pop-up calendar. In the Calendar view, the days of the week are offset by one day and there are no dates displayed in the Saturday column. This issue affects only IE 7 and IE 8 with compatibility mode turned ON.
To solve the problem you can switch off the compatibility mode. Click here for instructions on how to turn off compatibility mode.