March 18th is Sheelah’s Day.
The day after St. Patrick’s Day was known as Sheelah’s Day in rural Ireland. There is no consensuses on who Sheelah actually was – St. Patrick’s mother, his wife, or the ancient fertility goddess known as Sheela-na-gig. Some believe that it’s a day to celebrate femininity to balance out the masculinity of St. Patrick’s Day.
The only thing that is agreed upon is that this is a day to drink whiskey. One tradition is the drowning ceremony or the drowning of the shamrock. The shamrock worn on St. Patrick’s Day is also worn on Sheelah’s Day. When it’s time for the last round, the shamrock is dropped and drowned in the last glass of whiskey.