After a few day I was back yesterday.
First I upgraded the Thunderbird version, and I tried to start the calendar function which lasts for about 8 hours to come up this time.
I found some events lasting from January 2000 until 2013 which I deleted.
This process was interrupted several times which messages like:
"A script on this page may be busy, or it may have stopped responding. You can stop the script now,
or you can continue to see if the script complete.
Script: chrome://calendar/content/calendar-multiday-view.xml:957
"
The problem is solved now.