March 17 was Saint Patrick's Day. 

１７日３月は「聖パトリックの日」。

Four leaf clovers are a symbol of that day. People also wear green. 

四つ葉クローバはこの日のシンボル。グリーンの身なりも習慣。

When I was in elementary school, if you didn't wear green on this day then other children would pinch you! It was awful!

私は小学生でした、グリーンを着ないたら、他の子たちはつねった！悪いだった！

I think adults don't do that, instead they go to bars and drink beer. There is even green beer!

大人はそれをしないと思う。バーへ行くと、ビールを飲む。グリーンビールがある！

(If I use the wrong words could you please tell me? I often have to use a dictionary. Thank you!)