<?php

// Unix TimeStamp   Result           Comments
return [
    [-2147472000, 714], //  PHP 32-bit Earliest Date        14-Dec-1901
    [-2082931200, 1461], //                                  31-Dec-1903
    [-2082844800, 1462], //  Excel 1904 Calendar Base Date   01-Jan-1904
    [-2082758400, 1463], //                                  02-Jan-1904
    [-285120000, 22269], //                                  19-Dec-1960
    [0, 25569], //  PHP Base Date                   01-Jan-1970
    [408067200, 30292], //                                  07-Dec-1982
    [1213228800, 39611], //                                  12-Jun-2008
    [2147472000, 50424], //  PHP 32-bit Latest Date          19-Jan-2038
    [-2102494934, 1234.56789], //                                  18-May-1903 13:37:46
    [-1142494943, 12345.6789], //                                  18-Oct-1933 16:17:37
];