May 3, 2003 (Saturday)
- New Hampshire's famous landmark rock formation, the Old Man of the Mountain, collapses overnight.
- Funny Cide, a gelding, wins the Kentucky Derby.
- Titular Archbishop of Glendalough and Vatican representative in the United Nations in Geneva, Archbishop Diarmuid Martin is named Coadjutor Archbishop of Dublin by Pope John Paul II. His appointment is announced to worshippers at St. Mary's Pro-Cathedral in Dublin by the Archbishop of Dublin Cardinal Desmond Connell. No date is given for Connell's retirement but Martin's appointment takes immediate effect.
- Dar Heatherington, Lethbridge alderman, disappears in Great Falls, Montana, and is found three days later, alleging that she had been abducted and raped. A series of legal battles later stated that Heatherington had made these charges up, though she maintains her innocence.