PhpSpreadsheet/tests/data/Shared/Date/TimestampToExcel1900.php

<?php

// Unix TimeStamp   Result           Comments

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