The way I did it was simple using 4 elements.
1. create a keyword trigger (argument required).
2. Create a "Copy to Clipboard" element with {query} in the box.
3. Create a launch app element with Calendar
4. Add a run script element with code type as /osascript (AS):
on run
delay 0.5
tell application "System Events"
keystroke "n" using {command down}
keystroke "v" using {command down}
keystroke return
delay 0.5
key code 48
key code 125
end tell
end run
Vola.
Alas, it does not allow you to do it in the background but you could probably add some lines to the code to open the current application again.