A service of the Vanderbilt Divinity Library, the Revised Common Lectionary is a three-year cycle of weekly lections used to varying degrees by the vast majority of mainline Protestant churches in Canada and the United States. The RCL is built around the seasons of the Church Year, and includes four lections for each Sunday, as well as additional readings for major feast days. During most of the year, the lections are: a reading from the Hebrew Bible, a Psalm, a reading from the Epistles, and a Gospel reading. During the season of Easter, the Hebrew Bible lection is usually replaced with one from the Acts of the Apostles. The lections from the Hebrew Bible are sometimes chosen from the Apocrypha.
You can find instructions on how to add the lectionary readings to your calendar by clicking here.