2.2.2 VarDate Type
The VarDate type is the set of all references to Microsoft COM VARIANT data structures that have a VARTYPE enumeration value of VT_DATE.
VarDate values can be created only by host objects and host functions, or by calling the getVarDate method by using the prototype property of the Date object: Date.prototype.getVarDate. VarDate values can be manipulated similarly to other ECMAScript data types.