Question is still open - the calendar seen in outlook.com is a different thing from that in Outlook 2013 - entries on either side do not replicate to the other.
This is a pain: Normally I work with the desktop but I'd like to see and update my calendar using a mobile device. And I do not want to update two calendars in parallel.
The question has been answered.
When you create an outlook.com account in Outlook 2013, a calendar will be added to Outlook 2013. That's the calendar that syncs to outlook.com....so you copy the calendar entries from your old personal calendar to the newly created outlook.com calendar
- all within the Outlook 2013 software. Then when you make changes, add events, delete events, etc on the desktop computer, you'll do it to the newly created outlook.com calendar and not the old personal calendar (you don't use that one any more if you want
things to sync) and there is no need "to update two calendars in parellel."