2.2.29 [RFC5545] Section 3.3.5 Date-Time

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V0037:

The specification describes the DATE-TIME data type.

Microsoft Exchange Server 2007, Microsoft Exchange Server 2010, Microsoft Exchange Server 2013, Microsoft Exchange Server 2016, Microsoft Exchange Server 2019

On import, Microsoft Exchange Server parses any valid value DATE-TIME format (or DATE format if the VALUE parameter is set to "DATE"), as specified in [RFC5545]. Microsoft Exchange fails to import iCalendar objects that have an invalid DATE or DATE-TIME.

Microsoft Exchange treats any date before January 1, 1601, and any date after December 31, 4500 as invalid.

V0038:

The specification states that a time value MUST ONLY specify 60 seconds when specifying the periodic "leap second" in the time value.

Exchange 2007, Exchange 2010, Exchange 2013, Exchange 2016, Exchange 2019

Microsoft Exchange does not support "leap seconds." A value of 60 seconds is approximated as 59 seconds.