icalmerge(1) on Linux
The text d09c9af94b2b, as Debian 11 (Bullseye), Debian 10 (Buster) shipped it.
merge icalendar files, keeping only the most recent version of each event
The text d09c9af94b2b, as Debian 11 (Bullseye), Debian 10 (Buster) shipped it.
merge icalendar files, keeping only the most recent version of each event