2.2.92 [RFC5545] Section 3.8.7.2 Date-Time Stamp
V0209:
The specification states that non-standard property parameters can be specified on the DTSTAMP property.
Microsoft Office Outlook 2007, Microsoft Outlook 2010, Microsoft Outlook 2013
Outlook does not export any parameters on the DTSTAMP property. On import, Outlook ignores all parameters except TZID on the DTSTAMP property.
V0210:
The specification states that the DTSTAMP property MUST be specified within the VEVENT, VTODO, VJOURNAL, and VFREEBUSY components.
Office Outlook 2007, Outlook 2010, Outlook 2013
Outlook exports exactly one DTSTAMP property in each VEVENT component. Outlook does not export VTODO, VJOURNAL, or VFREEBUSY components.
On import, if the DTSTAMP property is not present on a VEVENT component, Outlook uses the time of import. If multiple DTSTAMP properties are found, Outlook ignores all but the first. Outlook ignores all DTSTAMP properties outside of a VEVENT component.
V0211:
The specification states that the DTSTAMP property value MUST be specified in UTC time format.
Office Outlook 2007, Outlook 2010, Outlook 2013
On import, Outlook can import DTSTAMP property values specified in UTC, local, or floating time format.