Add alerts to all events in certain calendar at once

You could use Applescript to do this. The following script adds a message with sound alarm 24 hours before each event.

Best wishes

John M

-- John Maisey -- www.nhoj.co.uk -- 20 Feb 2013
tell application "Calendar"
  launch
     repeat with myEvent in events of calendar "Celtics Schedule 2012-2013"
        make new sound alarm at end of sound alarms of myEvent with properties {trigger interval:-1440}
     end repeat
end tell

I'm glad it helped.

Hi,

This is the above script with the alarm settingh being removed and making the events all day. I'm not sure if this wiil stick for a subscribed calendar and don't have time to check now.

-- John Maisey -- www.nhoj.co.uk -- 2 March 2013
tell application "Calendar"
  launch
          repeat with myEvent in events of calendar "Celtics Schedule 2012-2013"
                    set allday event of myEvent to true
          end repeat
end tell

John M