<?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, ], ];