The Feast of Pope St. Sixtus I, Martyr
is today. There is information on him here. It is also the feast of St. Mary of Egypt, Penitent, St. Joseph the Hymnographer, and St. Richard of Chichester, Bishop.
According to the site I usually use for my saint information, this is the feast of St. Luigi Scrosoppi, C.O.. However, this was actually his feast as a beatus. When he was canonized in 2001, his feast was moved to October 5th. I have sent the site an e-mail requesting a correction.