I use a Google Calendar that Synchs with the calendar on my work account in Thunderbird Calendar. When I receive invites for recurring events on my Thunderbird email account, I find it is impossible to delete them. A whole list of past events remain open and keep disturbing me when they get activated as a new calendar event occurs or open up when I am typing a message and need to be minimized. A big nuisance. Can someone please help me with deleting these past event reminders that dont seem to go away. I have attached a screenshot that show three recurring meeting reminders for Nov 1,8 and 15 still remain on my calendar. A big Thank You Milind