site says EST, but it's still DST, so YMMV
Eligible for 25% off a Single Item!
Receive 25% off 1 eligible item if purchase between the hours of 12:00 pm EST and 6:00 pm EST!
HOW IT WORKS
To participate, simply add an eligible item to your cart and the discount will automatically be applied in the cart. Offer valid 10/20/2014 at 12:00pm EST to 10/20/2014 at 6:00pm EST.
http://www.sportsauthority.com/home/index.jsp