You know that when March hits and when March arrives there is a treat to look forward to every year when St. Patrick's Day is around the corner if you go to McDonald's. Every year during the month of March McDonald's debuts it's famous mint Shamrock Shake. In the 1970's the Shamrock Shake debuted for the first time with a special commercial and it features many people wearing green and drinking the famous shake toasting St. Patrick's Day. The Shamrock Shake is still a huge seller every March and I don't know why commercials for it today are scarce
Have a very Happy St. Patrick's Day this year
Bestie

Hi, Bestie! I like Shamrock shakes! I wish they had them all year! I have bot even thought about them in a long time. Thank you for reminding me. Next time I am at McDonald's, I will get a Shamrock Shake.
DTK

If it is a huge seller, there is no need to advertise it.