Creates a new date instance.
Returns the difference (in days) between this date and the specified 'other'
Returns the day of the month.
Returns the month (January = 1, February = 2, March = 3).
Returns the year (assume a valid range of 1900 to 9999).
Returns true if this SerialDate is within the specified range (caller specifies
whether or not the e
Returns the serial number for the date, where 1 January 1900 = 2 (this
corresponds, almost, to the n