The Sunday and Festival readings and propers at Mt. Calvary generally follow the the Three-Year Series (A, B, C). Year A focuses on the Gospel of Matthew, Year B focuses on the Gospel of Mark and selections from the Gospel of John, and Year C focuses on the Gospel of Luke.
Resources on the Lectionary
See the Three-Year Lectionary tab at this website: https://www.lcms.org/resources/worship/lectionary