When was valve's "Autumn" sale? Does anyone remember?
Answer: It was almost in December (a little late isn't it?). They could wait till May 31st and still call it a Spring sale.. hell they could wait till June 19th and call it a Spring sale. Spring isn't over yet.
Now, having said all of that, Spring/Autumn sales in the past have always been rather sucky compared to the Summer/Winter sales.... I would be surprised if the Spring sale managed to make me spend more than $20 this year.