2012 White Plains New York Saint Patrick's Day Parade: 15th Annual City of White Plains St. Patrick’s Day Parade. The White Plains St. Patrick’s Day, Parade Committee Presents a Celebration of the Wearing of the Green. We all look forward to the 15th Annual St. Patrick’s Day on Saturday, March 10, 2012! The White Plains Parade, like so many across the County and across the World, celebrates the contributions of the Irish people to humankind through their rich culture and music, their indomitable courage and spirit, and their legendary warmth and humor.