It's the Feast of St. Matthew, who was a publican and a bad sinner who got the call. Here's the Collect:
O ALMIGHTY God, who by thy blessed Son didst call Matthew from the recipt of custom to be an Apostle and Evangelist; Grant us grace to forsake all covetous desires, and inordinate love of riches, and to follow the same thy Son Jesus Christ, who liveth and reigneth with thee and the Holy Ghost, one God, world without end. Amen.
Now, there's a right way to worship God,
And a wrong way.
You decide which is which.