In the lobby of Saint Michael and All Angels Episcopal Church in Dallas on Sunday, churchgoers gathered around a table with multi-colored strips of paper. People bent over, pen in hand, as they wrote ...

The Prayer to St. Michael was a regular feature of the Mass until the Vatican II era, though Pope John Paul II in 1994 urged Catholics to make the prayer a regular part of their lives.

Yet a pleasant surprise came on Sept. 29, the feast day of St. Michael the Archangel, when Mr. Trump shared, without comment, a well-known prayer to the great saint.

Michaelmas, celebrated on September 29, is a Christian feast day honoring the Archangel Michael and all angels. Traditionally, it marks the end of the harvest season in Europe and serves as a ...