Clock and calendar issues have been with My Ford Touch on the Focus platform for a long time now (for at least 3 revisions of My Ford Touch now).
With the latest version (3.6) on my FFE I don't seem to be having the issues as much but still, occasionally, I see the clock messed up--most of the time it will fix itself.
The calendar, on the other hand, doesn't so readily fix itself (the main calendar issue is that car will think that the date is yesterday or today--seems to be off by +/- 1). Normally the calendar issue isn't that big of a deal on an ICE car but because the value charge settings use the calendar to determine if its a weekday or weekend we have a bigger problem with it (in my case I've set the value charge settings identical for both weekdays & weekends to mitigate the problem).