Free Weekend Day Car Rental from Hertz

Straight from the Hertz website:

Now through March 31, 2009, you can enjoy one free weekend day, when PC#127595 is included in your reservation of Economy through Full-size class cars. Only one redemption per month is permitted.

With this deal you could technically get two free days: one in February and one in March.

Of course this doesn't include SUVs or minivans... But it's still a great deal!