ST. LOUIS (KTVI) — McDonald’s Shamrock Shake and OREO Shamrock McFlurry are set to return at participating locations Feb. 21.

When the limited-time treats are back, McDonald’s wants customers to show how they are celebrating by using hashtags, #cbf2ac and #ShamrockShakeSZN!, according to a news release.

The Shamrock Shake is a “creamy, vanilla soft serve, blended with our unmistakable Shamrock Shake flavor and finished with a tasty whipped topping.”

The OREO Shamrock McFlurry debuted in 2020 and is “the perfect combo of vanilla soft serve with our Shamrock Shake flavor and OREO® cookie pieces,” the news release states.

For more information, visit McDonald’s website or Facebook page.