2.1.3.1.1.19.3.1 Property: DTSTART
RFC Reference: [RFC2445] section 4.8.2.4
Number of Instances Allowed: 1
Format: Date-Time ([RFC2445] section 4.3.5)
Brief Description: The effective start date of this onset of Daylight Saving Time.
Importing to and Exporting from Calendar objects
The behavior of this property is identical to the behavior of the DTSTART property of the STANDARD component (section 2.1.3.1.1.19.2.1) with the exception that stDaylightDate is modified instead of stStandardDate.