Why doesn't my Lumia 925 calendar sync with the calendar app on PC and Surface RT anymore?

[Anne Hope]

why doesn't my lumia 925 calendar sync with calendar app on PC and Surface RT anymore?

Until the denim update all three devices showed the calendar events seamlessly - why has this stopped. It has rendered my phone useless for my business

 

[ssapre]

Re: why doesn't my lumia 925 calendar sync with calendar app on PC and Surface RT anymore?

Calendar > Settings - Check if the calendar you are trying to see is checked here.
Also Settings > eMail + Accounts - check settings for your phone account if 'calendar' is checked in it. If not, this will not sync your calendar.