As the source and summit of our lives, all of our liturgical action and worship is centered upon the Eucharist. As such, we celebrate both daily Masses and all-school weekly Masses at St. John XXIII. Students are expected to be dressed in full Mass uniform for our all-school Masses.

Mass Schedule:
Monday - 7:20am
Tuesday - 7:20am
Wednesday (All-School Mass) - 9:20am*
Thursday - 7:20am
Friday - 7:20am

*The All-School Mass may be celebrated on other days of the week for Solemnities, Holy Days of Obligation, and/or other special occasions.
Opportunities for students to be involved in Liturgy include serving as Lector, Altar Server, Member of the Choir, Musician, and Sacristan. Please contact Mrs. DeMois in Campus Ministry to volunteer.

In addition to the celebration of the Eucharist, SJ23 offers the following:
  • School-wide Penance services twice a year
  • Daily opportunities for individual confession
  • Eucharistic Adoration every Friday in the chapel
  • The Angelus daily (Regina Coeli during the Easter season)
  • Morning prayer for the Liturgical Seasons and Celebrations
  • After School prayer
Parents are invited to offer an hour of adoration before the Blessed Sacrament every Friday in our chapel. This is a beautiful ministry coordinated and staffed by parent volunteers. To receive weekly emails with the sign up for adoration, contact Mrs. DeMois at

St. John XXIII College Preparatory

1800 W. Grand Parkway N. | Katy, Texas 77449
p 281.693.1000
f 281.693.1001
Our Mission
St. John XXIII College Preparatory forms the hearts and minds of young men and women in a Christ-centered community dedicated to academic excellence, the pursuit of virtue, and service to others in the Tradition of the Catholic Church.