The shamrock is a symbol of Ireland and is well known around the world.
Guys who don't want to wear full body leprechaun mascot costumes while they bar hop on St. Patty's Day might consider wearing a traditional shirt and jeans, while rocking the holiday with shamrock shades, a green wig or a shamrock top hat.
The Irish wear the shamrock with pride, and particularly so on St Patrick 's Day.
Shortly before St Patrick's Day the queen issued an order which intensified this interest, that Irish soldiers might in future wear a sprig of shamrock in their headgear on this national festival.
His followers adopted the custom of wearing a shamrock on his feast day.