Rated 4 out of 5 stars

by John Rose on Nov. 1, 2014 · permalink

I was not able to delete my calendar (i.e. as accessed by Lightning) as the delete menu option was grayed out. However, by adding a task list to the calendar, it then gave me the option of deleting the calendar, which I did: looks like a bug in Lightning. I then selected the New Calendar menu option etc and the calendar returned in Thunderbird.