The Feast of St. Waltheof of Melrose, O. Cist., Abbot
is today. There is information on him here.
It is also the feast of St. Nicodemus, and St. Lydia.

We read in the Acts of the Apostles of "Lydia, whose heart the Lord opened to attend to those things which were said by Paul." And we are told on another occasion, that "as many as were ordained," or disposed by God, "to life everlasting, believed." And St. John tells us, "He that knoweth God, heareth us; he that is not of God, heareth us not; by this we know the spirit of truth, and the spirit of error."

Venerable John Henry Newman, C.O., An Essay in aid of a Grammar of Assent