AppointmentItem.EndUTC Property (Outlook)
Office 2013
Published: July 16, 2012
Returns or sets a Date value that represents the end date and time of the appointment expressed in the Coordinated Univeral Time (UTC) standard. Read/write.
Changing the value for the AppointmentItem.End property or the AppointmentItem.EndTimeZone property will cause Outlook to recalculate the EndUTC.