Rated 4 out of 5 stars

A big problem this January 22, 2025: My Google calendar serves me as a journal of all my past activities.
It starts in 1950!

Usually I can see all the family events since that date.
Today's furthest event in the past is December 3, 2024.

Thunderbird c. 115.18.0 (64 bits) in Linux Mint (Synaptic does not contain Thundrbird v. 128).
There is definitely a recent bug.

Furthermore Evolution (only for Linux) shows all the events since 1950.