Hi, Developers have already been notified since the 1st day of TB 128 version release about the problem. The so much appraised calendar in version 115 does not fully function in v. 128. The same old history is repeated. Sth is fixed, then sth breaks or malfunction. We, as users of Thunderbird do not have now the possibility to control all events registered in the calendar. To do that we use other applications then delete the calendar in TB and create a new one. Do we deserve this? Why the new foundation keeps asking us to contribute economically when we never have a fully functional application? (see attached image of Bugzilla records for the calendar issue)