Returns the serial number for the date, where 1 January 1900 = 2
(this corresponds, almost, to the numbering system used in Microsoft
Excel for Windows and Lotus 1-2-3).
Returns the serial number for the date, where 1 January 1900 = 2 (this
corresponds, almost, to the numbering system used in Microsoft Excel for
Windows and Lotus 1-2-3).