Shamrock is a national emblem of Ireland, connected to Irish identity and pride. Tourists often buy shamrock souvenirs to remember their trip to Ireland.
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St. Patrick's Day
Shamrocks are especially popular on St. Patrick's Day, a holiday celebrating Irish culture. People bake shamrock-shaped cookies for St. Patrick's Day.
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Three Leaves
A true shamrock has three leaves, not four; four-leaf clovers are different. She searched for a four-leaf clover but only found shamrocks.