The number of milliseconds between the specified date and time and midnight GMT on January 1, 1970.
Date.parse( ) is a static method of Date. It is always invoked through the Date constructor as Date.parse( ), not through a Date object as date.parse( ). Date.parse( ) takes a single string argument. It parses the date contained in this string and returns it in millisecond format, which can be used directly, used to create a new Date object, or used to set the date in an existing Date object with Date.setTime( ).