A workaround is to backup evolution (file --> backup settings). When restarted uncheck/check birthdays and anniversaries and that should force then to appear. It's tedious but probably good practice to backup anyway.
I thought this problem was related to sharing my .evolution folder with another computer through Dropbox, but having read this and similar threads, it seems to be a longstanding bug in evolution. -- Calendar > Contacts > Birthdays & Anniversaries forgets displaying birthdays https://bugs.launchpad.net/bugs/246251 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs