From Drivethrurpg : 

"He regularly stabs, mangles, perforates, burns, and otherwise damages your precious character. She delights in torturing your PC's emotions, thwarting their every plan, denying every desire. And you love your GM for just these things and more!

Celebrate the teller of interactive tales with the rest of us, as we present "One Fourth Off for the Fourth" - GM'S DAY! 25% off hundreds upon hundreds of titles!

The sale runs from March 3rd to March 8th."

And just in case you were wondering, all PDFs by Hex Games are included in the sale.  So head over to Drivethru (or RPGnow) and get some great deals. Then tell your friends to do the same.