I think I have maybe had one sip of a Shamrock Shake in my entire life. Not a fan of the mint, exactly. But I love them all the same. The concept of a only-for-a-limited-time item, in a color that milkshakes just are never in, it was a huge fascination.
They came out in 1970, so they're a true Xer food item. Wikipedia says they are "credited with helping pave the way for other seasonal drinks, including Starbucks Coffee's pumpkin spice and eggnog lattes."
Canadians, however, are mostly out of luck. Shamrock Shakes are much rarer there -- apparently they showed up in 2008, but before then, had been missing for five years.
Uncle O'Grimacey, purple Grimace's green Irish relative, used to promote the shakes. And we thought GRIMACE was weird...
Were you, or are you a Shamrock Shake fan? Do you remember Uncle O'Grimacey? What other seasonal fast-food offerings are you a fan of?