A large part of Org mode’s interoperability success is its ability to easily export to or import from external applications. The iCalendar export backend takes calendar data from Org files and exports to the standard iCalendar format.
org-icalendar-export-to-ics)Create iCalendar entries from the current Org buffer and store them in the same directory, using a file extension ‘.ics’.
org-icalendar-combine-agenda-files)Create a combined iCalendar file from Org files in
org-agenda-files and write it to
org-icalendar-combined-agenda-file file name.