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21 years ago
Had a similar problem as curlee, except I needed to create a JDE_ERP date.  [format is CYYDDD]

<?php

function jde_date_create($month, $day, $year){
    /*
    *  NOTE: $month and $day CANNOT have leading zeroes, 
    *        $year must be'YYYY' format
    */
    $jde_year_prefix = substr($year, 0, 1) - 1;
    $jde_year_suffix = substr($year, -2);
    
    //note that valid years for mktime are 1902-2037
    $timestamp = mktime(0,0,0,$month, $day, $year);
    $baseline_timestamp = mktime(0,0,0,1,0,$year);
    
    $day_count = round(($timestamp - $baseline_timestamp)/86400);
    $day_count_padded = str_pad($day_count,3,"0",STR_PAD_LEFT);

    return ($jde_year_prefix . $jde_year_suffix . $day_count_padded);
    
}

echo jde_date_create(6,25,2000);// will return '103176'

?>

--
Jim
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