Swat/SwatDate.php
public function subtractDays($days)
    {
        $days = (int) $days;
        $days = -$days;
        return $this->addDays($days);
    }
public function subtractDays($days)
    {
        $days = (int) $days;
        $days = -$days;
        return $this->addDays($days);
    }
public function subtractDays ( $ days ) { $ days = ( int ) $ days ; $ days = - $ days ; return $ this -> addDays ( $ days ) ; }
Subtracts the specified number of days from this date

@param integer $days the number of days to subtract.

@return this object on success or false on failure.
Subtracts the specified number of days from this date