Cannot change the date of a recurring event on the device
Posted by on 21 August 2012 03:16 PM

You cannot open a recurring event and edit the date fields on the device.  This is the case when you attempt to edit dates for one occurrence or for the entire series. 

The only workaround is to edit the event dates from the server. B9191

This is an issue with the device and has been observed on:

-HTC Desire X, Explorer, and One S