Re: Setting calendar date
Go to settings, date and time. Either using the gear icon at top right, then scroll down to date and time in the list, or clicking on the date at top of screen and clicking on the calendar that pops up brings you straight there.
Re: Setting calendar date
Go into settings (the gear in the top right corner) then on the left scroll down to "Date & Time", then turn off "set date and time automatically" then reset date.
Re: Setting calendar date
If it's automatic, is it possible you have set wrong time zone, and are 12 hours out giving wrong day?
Re: Setting calendar date