The Ecumenical Sunday Opening Day / category1014, Uncategorized / By UNitedn_Admin An Ecumenical Opening Day Hundreds to gather for official Welcome to our visitors, Sunday, September 17, Opening Day Mass, Saint Patrick Cathedral. Mass at 10:15 am. Officials, Dignitaries to please RSVP by Thursday, September 15 for proper seating. Email: info@unitednationsweekly.net