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

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

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