Starbucks Happy Hour: 1/2 Price Frappuccinos Starts Today (5/1)! May 1, 2014 by Rebekah The links in the post below may be affiliate links. Read the full disclosure.Print Email Don’t forget that today is the big day! Starbucks is kicking off their Happy Hour, which means 1/2 price Frappuccinos from 3-5pm. The best part is, you get 10 whole days to enjoy this sweet deal! I know where I’ll be headed at 3:00 today.