First of all, although all states do have a 21 year old minimum for buying and drinking alcohol, it is not a federal law. This means that each state is free to create its own laws, punishments, and agencies.
Title: Leinster Flag/ Naval Jack. Description: This flag represents one of the four provinces of Ireland, Leinster, whose capital is Dublin. The flag was previously used by the United Irishmen in 1798, Daniel O'Connel's Repeal of the Union campaign in the 1830s and 1840s, and the Irish Republican Brotherhood (IRB).
The most common St Patrick's Day symbol is the shamrock. 1  The shamrock is the leaf of the clover plant and a symbol of the Holy Trinity. Other symbols include: 2  Almost anything green. 3  The green, orange and white flag of the Republic of Ireland. 4  Brands of beer associated with Irish culture.