Because the holiday allows drinking during Lent. Traditionally Irish wakes are drank at, and St. Patrick's day is actually on the day St. Patrick died.
Traditionally the Irish drink during wakes to honor the dead, Saint Patrick's day is celebrated on the day it is thought Saint Patrick died.. making the holiday similar to a being his wake. This...
Because people just want an excuse to go wild and party and get drunk. They regret it later, but it does NOT have to do with the holiday!!!
Anything you buy me.