I'm receiving the following error after upgrading Events to 5.2.1 on DNN 6.0.2.

[NullReferenceException: Object reference not set to an instance of an object.]
   DotNetNuke.Modules.Events.vEvent.CreatevTimezone(DateTime dtStartDate, DateTime dtEndDate) +419
   DotNetNuke.Modules.Events.vEvent.CreateiCal(Int32 iTabID, Int32 iModuleID, Int64 iItemID, String iCategoryName, Int32 iCategoryID) +2705
   DotNetNuke.Modules.Events.vEvent.ProcessVCalRequest(HttpContext inContext) +998
   DotNetNuke.Modules.Events.EventVCal.Page_Load(Object sender, EventArgs e) +38
   System.Web.UI.Control.OnLoad(EventArgs e) +99
   System.Web.UI.Control.LoadRecursive() +50
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627

Normally I like to update people when I find out what the issue is. The problem in this case related to the timezone being used on the server being one that doesn't observe DST. I have provided a fix which will be include in Events 6.0.0.

For anyone who needs this fix in advance of that, please post mail me at webmaster @ the domain in my profile, and I'll get the fix over. Note that I only have the fix against a 5.2.1 release, so if you are on 5.2.2 I can't help at the moment.

Thanks
Roger

We don't intend to produce a 5.2.2 fix. The fix will be included in 6.0.0. I'll let you know if that decision changes.

Roger