I'm trying to find a way to disable the reminders for the contact birthdays calendar. The problem is this calendar is read only so I can't confirm the reminder using Thunderbird + Lightning. This leads to a popup coming up every 5 minutes or so for each birthday of the last 30 days which is pretty annoying Checking the calendar entries via web interface, the events are set to "Pop-Up at the beginning of the event".
btw: Interestingly I don't get reminders on my smartphone using Davdroid and Etar.
Thanks a lot in advance =)