Birthdays appear twice in calendar

Cardbook for Thunderbird Forums Main Forum Birthdays appear twice in calendar

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    • #3205

      Birthdays from cardbook appear twice in lightning with 31 days offset.

      I use the “birthdays” function (last item in settings) to synchronize the birthdays (and anniversaries and days of death) with the calendar (settings below for reference). This works, the birthdays show up in the Lightning calendar. However, in addition to the correct day, the appear again 31 days later. This does not happen for all birthdays but only the ones that are synced in the window at startup.

      So a birthday on 19900101 will correctly appear on January 1st, 2021, but then again on February 1st, 2021. A birthday on February 2nd appears again on March 5th (+31 days). The vcard has no duplicated entry but the calendar has.


      • all address books
      • birthday, anniversary, day of death
      • calendar: birthdays
      • days for searching: 30
      • show pop-up at startup, not daily and show if empty
      • days to enter birthdays: 300
      • synchronize at start-up
      • whole day
      • reminder 168 h
      • category birthday (Geburtstag)

      Cardbook 46.6

      Thunderbird 68.10.0 (64-Bit)

    • #3215

      please test with Thunderbird 78 🙂

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