PhpSpreadsheet/tests/data/Shared/Date/FormattedPHPToExcel1900.php

<?php

//    Year   Month  Day  Hours  Minutes  Seconds  Result            Comments
return [
    [ 1901,  12,    14,                           714         ],    //    PHP 32-bit Earliest Date        14-Dec-1901
    [ 1903,  12,    31,                           1461        ],    //                                    31-Dec-1903
    [ 1904,  1,     1,                            1462        ],    //    Excel 1904 Calendar Base Date   01-Jan-1904
    [ 1904,  1,     2,                            1463        ],    //                                    02-Jan-1904
    [ 1960,  12,    19,                           22269       ],    //                                    19-Dec-1960
    [ 1970,  1,     1,                            25569       ],    //    PHP Base Date                   01-Jan-1970
    [ 1982,  12,    7,                            30292       ],    //                                    07-Dec-1982
    [ 2008,  6,     12,                           39611       ],    //                                    12-Jun-2008
    [ 2038,  1,     19,                           50424       ],    //    PHP 32-bit Latest Date          19-Jan-2038
    [ 1903,  5,     18,  13,    37,      46,      1234.56789  ],    //                                    18-May-1903 13:37:46
    [ 1933,  10,    18,  16,    17,      37,      12345.6789  ],    //                                    18-Oct-1933 16:17:37
];