Do you remember your first time?
The first time you had a Shamrock Shake, of course!
See also: 25 Animals Ready to Shamrock for St. Paddy's Day
The infamous mint-flavored frozen-drink is back at McDonalds in celebration of St. Patrick's Day, so naturally, people are flocking to Instagram to show their love for the festive beverage — with selfies.
The brain-freeze-inducing drink has created a cult following since its introduction to the United States in 1970. Although the shake did disappear from the menu in some locations in the '90s and early 2000s, it has made a strong comeback since its makeover in 2010.
So raise your phone, drink in hand and do the Shamrock Shake.