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