The United States Conference of Catholic Bishops (USCCB) is an assembly of the hierarchy of the United States and the U.S. Virgin Islands who jointly exercise certain pastoral functions on behalf of the Christian faithful of the United States.
One of the functions of the USCCB is to communicate Catholic discipline to the church in the United States. This includes, among many other things, the readings for all Masses.
To see the readings for Masses, visit the USCCB website at: www.usccb.org/readings