An AppleScript to automatically create a calendar event from an e-mail containing a date and time of the form "March 10, 2015 12:00 - 2:00 PM". Distributed under MIT license (see below)

email to calendar

(*
	Create Calendar event from Message
*)
set theContent to string

-- A subroutine to strip all tags from html
on remove_markup(this_text)
	set copy_flag to true
	set the clean_text to ""
	repeat with this_char in this_text
		set this_char to the contents of this_char
		if this_char is "<" then
			set the copy_flag to false
		else if this_char is ">" then
			set the copy_flag to true
		else if the copy_flag is true then
			set the clean_text to the clean_text & this_char as string
		end if
	end repeat
	return the clean_text
end remove_markup

tell application "Microsoft Outlook"
	
-- get the currently selected message or messages
	set selectedMessages to current messages
	
-- if there are no messages selected, warn the user and then quit
	if selectedMessages is {} then
		display dialog "Please select a message first and then run this script." with icon 1
		return
	end if
	
	repeat with theMessage in selectedMessages
		
-- get the information from the message, and store it in variables
		set theName to subject of theMessage
		set theCategory to category of theMessage
		set theContent to content of theMessage

-- Strip out all the newlines and returns, so the text can be piped into echo
		set AppleScript's text item delimiters to {return & linefeed, return, linefeed, character id 8233, character id 8232, character id 40, character id 41}
		set newText to text items of theContent
		set AppleScript's text item delimiters to {" "}
		set newText to newText as text

-- Get rid of all the html tags
		set newText to my remove_markup(newText)
		"echo " & quoted form of newText & " | grep -o .*"
		set theMonth to do shell script "printf " & quoted form of newText & " | grep -o \"January\\|February\\|March\\|April\\|May\\|June\\|July\\|August\\|September\\|October\\|Novermber\\|December\" | head -n1"
		set theDay to do shell script "echo " & quoted form of newText & " | grep -o \"" & theMonth & " [0-9]\\{1,2\\}\" | grep -o \"[0-9]\\{1,2\\}\""
		set theYear to do shell script "echo " & quoted form of newText & " | grep -o \"2015\\|2016\\|2017\" | head -n1"
--If no year is specified, assume it's for the current year
		if (length of theYear) = 0 then
			set theYear to year of (current date)
		end if
		
		set startTime to do shell script "printf " & quoted form of newText & " | grep -o \"[0-9]\\{1,2\\}:[0-9]\\{1,2\\}\" | head -n1"
		set endTime to do shell script "printf " & quoted form of newText & " | grep -o \"[0-9]\\{1,2\\}:[0-9]\\{1,2\\}\" | tail -n1"
		set ampm to do shell script "echo " & quoted form of newText & " | grep -o \"AM\\|PM\\|pm\" | head -n1"
		
-- create a new event with the information from the task
		set startDate to date (theMonth & " " & theDay & ", " & theYear & " " & startTime & " " & ampm) as date
		set endDate to date (theMonth & " " & theDay & ", " & theYear & " " & endTime & " " & ampm) as date
		set newEvent to make new calendar event with properties {subject:theName, category:theCategory, content:theContent, start time:startDate, end time:endDate}
		
	end repeat
end tell