BEGIN:VCALENDAR
CALSCALE:GREGORIAN
X-WR-TIMEZONE;VALUE=TEXT:US/Central
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20130523T140630Z
DTSTART:20121209T060100Z
DTEND:20121209T120000Z
DESCRIPTION:Service availability may be intermittent during the maintenance window.
LOCATION:UT Austin
SUMMARY:SharePoint Maintenance Window
UID:ut-its-maint-001-2212
X-MICROSOFT-CDO-BUSYSTATUS:FREE 
BEGIN:VALARM
TRIGGER:-PT1H
ACTION:DISPLAY
END:VALARM
END:VEVENT
END:VCALENDAR