(do-applescript "
use AppleScript version "2.4" -- Yosemite (10.10) or later
use script "CalendarLib" version "1.1.3" -- put this at the top of your     scripts
use scripting additions

set d1 to current date
set d2 to d1 + 1 * hours
set theStore to fetch store
set theCal to fetch calendar "activities" cal type cal cloud event store theStore -- change to suit
set theEvent to create event event store theStore destination calendar theCal event summary "A test event" starting date d1 ending date d2 event location "Around here" event description "some notes" without runs all day store event event theEvent event store theStore with future events
return event identifier for event theEvent
")