Hertz.com Up to $30 Off Promo Code on Weekly or Weekend Car Rental Service. Discount coupon provides $5 Off per day on weekly and weekend car rental service. Car rental offer is valid from February 1, 2018, to April 15, 2018. This offer valid for all car classes and larger except Dream Cars® and Shelby GT-H. Offer is valid on base rate. Base rate includes time and mileage charges only