Calendar

I have just started using PEAR::Calendar, with the examples provided. Everything works ok, but have a problem with the "attach a payload" script (20.php), specifically the $events array; If I change the format from; $events[] = array(

    'start' => $cal->cE->dateToStamp(2005, 9, 5, 10),
    'end'   => $cal->cE->dateToStamp(2005, 9, 10, 23, 59),
    'desc'  => 'Holidays!'

); to (using just a mysql date field) $events[] = array(

    'start' => $cal->cE->dateToStamp(2005, 9, 5),
    'end'   => $cal->cE->dateToStamp(2005, 9, 10),
    'desc'  => 'Holidays!'

); it calculates the dates wrong, ie instead of from 5/9/2005 to 10/9/2005, it returns values for 4/9/2005 to 9/9/2005 (out by 1 day). Any help would be appreciated. thanks Ger