Reproduced from the phone, see below. Tz seems to be GMT+DST.
<t:CalendarItem> <t:ItemId Id="AAMkAGUyNGFlY2FiLTJiMjUtNDIyZi1hOGQ1LTgxMjkzYTIwOTBjNABGAAAAAAAIvLhxE1XXRpxK18urY2WsBwAItEkKFRbxS7a/MJ9Bo6xlAGBePWS4AAAItEkKFRbxS7a/MJ9Bo6xlAHyc846UAAA=" ChangeKey="DwAAABYAAAAItEkKFRbxS7a/MJ9Bo6xlAHyc9wbK"/> <t:Subject>Test3</t:Subject> <t:Body BodyType="Text"/> <t:DateTimeReceived>2011-02-18T08:18:21Z</t:DateTimeReceived> <t:ReminderDueBy>2011-02-28T07:00:00Z</t:ReminderDueBy> <t:ReminderIsSet>true</t:ReminderIsSet> <t:ReminderMinutesBeforeStart>15</t:ReminderMinutesBeforeStart> <t:ExtendedProperty> <t:ExtendedFieldURI DistinguishedPropertySetId="Common" PropertyId="34144" PropertyType="SystemTime"/> <t:Value>2011-02-28T06:45:00Z</t:Value> </t:ExtendedProperty> <t:ExtendedProperty> <t:ExtendedFieldURI DistinguishedPropertySetId="Meeting" PropertyId="3" PropertyType="Binary"/> <t:Value>BAAAAIIA4AB0xbcQGoLgCAAAAAAAAAAAAAAAAAAAAAAAAAAAYwAAAHZDYWwtVWlkAQAAADQ1NjE3MzIwNTU2OTY0MjA1NDYxNjcyMDVCMjY1RTI1MjQyMzQwMjE1RDZBMzEzNzQzNjMzNTQyNzMzNDQ2MzIzNTY4MzUzMzRENTk0MTM4MzQ1MjMyAA==</t:Value> </t:ExtendedProperty> <t:UID>4561732055696420546167205B265E25242340215D6A31374363354273344632356835334D594138345232</t:UID> <t:Start>2011-02-28T07:00:00Z</t:Start> <t:End>2011-02-28T08:00:00Z</t:End> <t:IsAllDayEvent>false</t:IsAllDayEvent> <t:IsCancelled>false</t:IsCancelled> <t:CalendarItemType>RecurringMaster</t:CalendarItemType> <t:MyResponseType>Organizer</t:MyResponseType> <t:Organizer> <t:Mailbox> <t:Name>Jan-Åke Larsson</t:Name> <t:EmailAddress><email address hidden></t:EmailAddress> <t:RoutingType>SMTP</t:RoutingType> </t:Mailbox> </t:Organizer> <t:Recurrence> <t:DailyRecurrence> <t:Interval>1</t:Interval> </t:DailyRecurrence> <t:NumberedRecurrence> <t:StartDate>2011-02-28Z</t:StartDate> <t:NumberOfOccurrences>2</t:NumberOfOccurrences> </t:NumberedRecurrence> </t:Recurrence> <t:FirstOccurrence> <t:ItemId Id="AAMkAGUyNGFlY2FiLTJiMjUtNDIyZi1hOGQ1LTgxMjkzYTIwOTBjNAFRAAiIzaTpMdzYAEYAAAAACLy4cRNV10acStfLq2NlrAcACLRJChUW8Uu2vzCfQaOsZQBgXj1kuAAACLRJChUW8Uu2vzCfQaOsZQB8nPOOlAAAEA==" ChangeKey="DwAAABYAAAAItEkKFRbxS7a/MJ9Bo6xlAHyc9wbK"/> <t:Start>2011-02-28T07:00:00Z</t:Start> <t:End>2011-02-28T08:00:00Z</t:End> <t:OriginalStart>2011-02-28T07:00:00Z</t:OriginalStart> </t:FirstOccurrence> <t:LastOccurrence> <t:ItemId Id="AAMkAGUyNGFlY2FiLTJiMjUtNDIyZi1hOGQ1LTgxMjkzYTIwOTBjNAFRAAiIzaWyXEaYAEYAAAAACLy4cRNV10acStfLq2NlrAcACLRJChUW8Uu2vzCfQaOsZQBgXj1kuAAACLRJChUW8Uu2vzCfQaOsZQB8nPOOlAAAEA==" ChangeKey="DwAAABYAAAAItEkKFRbxS7a/MJ9Bo6xlAHyc9wbK"/> <t:Start>2011-03-01T07:00:00Z</t:Start> <t:End>2011-03-01T08:00:00Z</t:End> <t:OriginalStart>2011-03-01T07:00:00Z</t:OriginalStart> </t:LastOccurrence> <t:MeetingTimeZone> <t:BaseOffset>PT0M</t:BaseOffset> <t:Standard TimeZoneName="(GMT+00:00) Time Zone"> <t:Offset>PT0M</t:Offset> <t:RelativeYearlyRecurrence> <t:DaysOfWeek>Sunday</t:DaysOfWeek> <t:DayOfWeekIndex>First</t:DayOfWeekIndex> <t:Month>January</t:Month> </t:RelativeYearlyRecurrence> <t:Time>00:00:00</t:Time> </t:Standard> <t:Daylight TimeZoneName="(GMT+00:00) Time Zone"> <t:Offset>-PT60M</t:Offset> <t:RelativeYearlyRecurrence> <t:DaysOfWeek>Sunday</t:DaysOfWeek> <t:DayOfWeekIndex>Last</t:DayOfWeekIndex> <t:Month>October</t:Month> </t:RelativeYearlyRecurrence> <t:Time>01:00:00</t:Time> </t:Daylight> </t:MeetingTimeZone> </t:CalendarItem>
Reproduced from the phone, see below. Tz seems to be GMT+DST.