Thursday, February 7, is a very big day. Starbucks will bring back its almost-weekly "Happy Hour" with an offer for 50% off espresso drinks size grande or larger. That means any hand-crafted espresso drink, including the brand new cherry-flavored moch a . The deal is good from 3pm to close at participating locations all across the country. That excludes hot and cold brewed coffee, Frappuccinos, and any ready-to-drink beverages, according to Thrillest.com.