static public function compare(d1:Date, d2:Date):Number
Returns -1 if passed-in d1 date is inferior to d2
date.
Else 0 if dates are equal or 1 if d1 is superior to
d2
static public function getShortYear(date:Date):String
Returns short year format from passed-in date object
static public function getShortHour(date:Date):Number
Returns short hour format from passed-in date object