Hi, a couple of weeks ago my Thunderbird calendar lost all maintained events (e.g. yearly repeating birthdays of family members, daily repeating events, etc.). I am not sure exactly when it happened (somehow you do not miss missing events for some time...), but it might have happened in combination with a release upgrade. Before this the calendar and the events worked fine for many years. In addition when I am now trying to create a new event with custom recurrence (weekly, every Saturday and Sunday, no end date) I cannot see the event on any of the scheduled days in the calendar (even though Saturdays and Sundays are now displayed in bold in the overview). I do get the reminder for the current day instance of the event, I can see the event listed under "Tomorrow" in the "Event and Task" pane. Thanks in advance for any help, B.