This property specifies the date and time that the information associated with the calendar component was last revised in the calendar store.
Note: This is analogous to the modification date and time for a file in the file system.
IANA and non-standard property parameters can be specified on this property.
The property value MUST be specified in the UTC time format.
This property is defined by the following notation:
last-mod = "LAST-MODIFIED" lstparam ":" date-time CRLF
lstparam = *(";" other-param)
The following is an example of this property