property Calendar.LongDateFormat as String
Indicates the long date format.

TypeDescription
String A String expression that defines the long date format. The LongDateFormat suports tags as described bellow.
By default, the LongDateFormat property is "<%loc_ldate%>", so the format of the long date as defined in the regional settings is currently used. The KnownProperty(exEventDisplayLongMargins) property uses the LongDateFormat property to display the event's margins in a long date format. For instance, an all-day event ( AllDayEvent property ) displays the starting and ending margins of the event in a long date format. The ShortDateFormat property defines the short date format to be used when label properties includes the <%=%256%> TAG.

In conclusion, the LongDateFormat property defines the long date format being used to display the event's margins, when the <%=%257%> is included in the label properties such as: 

The property supports the following TAGs:

The following tags are displayed based on the user's Regional and Language Options: