| <-July 1966 | August 1966: | September 1966-> |
| Sunday: | Monday: | Tuesday: | Wednesday: | Thursday: | Friday: | Saturday: |
| 1: The 18th Monday in Ordinary Time | 2: The 18th Tuesday in Ordinary Time | 3: The 18th Wednesday in Ordinary Time | 4: The 18th Thursday in Ordinary Time | 5: The 18th Friday in Ordinary Time | 6: The Transfiguration | 7: The 19th Sunday in Ordinary Time |
| 8: The 19th Monday in Ordinary Time | 9: The 19th Tuesday in Ordinary Time | 10: The Feast of Saint Lawrence, Deacon and Martyr | 11: The 19th Thursday in Ordinary Time | 12: The 19th Friday in Ordinary Time | 13: The 19th Saturday in Ordinary Time | 14: The 20th Sunday in Ordinary Time |
| 15: The Solemnity of The Assumption of Blessed Virgin (Holy Day of Obligation) | 16: The 20th Tuesday in Ordinary Time | 17: The 20th Wednesday in Ordinary Time | 18: The 20th Thursday in Ordinary Time | 19: The 20th Friday in Ordinary Time | 20: The 20th Saturday in Ordinary Time | 21: The 21st Sunday in Ordinary Time |
| 22: The 21st Monday in Ordinary Time | 23: The 21st Tuesday in Ordinary Time | 24: The Feast of Saint Bartholomew, Apostle | 25: The 21st Thursday in Ordinary Time | 26: The 21st Friday in Ordinary Time | 27: The 21st Saturday in Ordinary Time | 28: The 22nd Sunday in Ordinary Time |
| 29: The Beheading of John the Baptist, Martyr | 30: The 22nd Tuesday in Ordinary Time | 31: The 22nd Wednesday in Ordinary Time |