xny/vendor/phpoffice/phpspreadsheet/tests/data/Calculation/DateTime/DAYOpenOffice.php

<?php

//  OpenOffice Result, Argument

return [
    [19, '22269'],
    [1, '30348'],
    [10, '30843'],
    [11, '"11-Nov-1918"'],
    [28, '"28-Feb-1904"'],
    ['#VALUE!', '"Invalid"'],
    [29, '-1'],
    [31, '1'],
    [30, '0.5'],
    [30, '0'],
    [30, 'Q15'],
    [31, 'true'],
    [30, 'false'],
];