Missing personal calendar

Hi,

after the last "akonadictl fsck" I am missing suddenly my personal
calendar with all my dates gone. Since I do regular backups, I wonder
where all the data is stored. Any documentation I've found tell me, that
korganizer uses an .ics file, but the youngest .ics file on my disk (and
backups) is from December last year. Yes, it contains (old) dates, but
where have all the dates been stored in the mean time?

Regards,
Jörg