It's a time-honored tradition to celebrate the anniversary of a saint's death with a day of feasting and festivities. Some saints have a more dedicated following than others, though, and St. Patrick as the patron saint of Ireland is a big favorite, both in the U.S. and abroad. St. Patrick was a fifth-century Christian missionary recognized for converting many Irish pagans to Christianity. And although the Irish in Dublin honor the holiday with a weeklong festival, in other locations it's typically a day-long affair occurring on March 17.
It may all be blarney, but St. Patrick has been credited with teaching the concept of the holy trinity using a three-leaf clover. If your children insist on wearing green and sporting four leaf clovers, don't be too concerned. Celebrating Irish culture is part of the fun of the holiday.