BETTENDORF, Iowa — People on both sides of the Mississippi River sing music written by David Haas at Mass each weekend, but on Friday, Sept. 27, they will get to hear him sing to them during a concert at St. John Vianney Church, 4097 18th St. It will begin at 7:30 p.m.

The following day he will offer a workshop for liturgists, church musicians and choir members from 8:30 a.m. to 2:30 p.m., also at St. John Vianney Church. Lunch and handouts will be provided, and day care will be available upon request.

The concert on Sept. 27 is $15 for students and seniors and $20 for adults with pre-registration or $25 at the door. For tickets, call (563) 336-8414.
Pre-registration is required for the liturgy workshop on Sept. 28. The cost is $20 for students and $25 for adults. To register, call (563) 336-8414.

All proceeds from these events benefit Our Lady of the Prairie Retreat, a ministry of the Congregation of the Humility of Mary.

The composer of such songs as “Blest Are They,” “We Are Called” and “You Are Mine,” Haas has produced more than 40 collections of original music. His newest projects with music publisher GIA include “A Changed Heart, Your Call is Constant,” a book of prayers and reflections, and “Mass for a New World.”

Haas lives in Eagan, Minn., where he is the director of The Emmaus Center for Music, Prayer and Ministry. He also serves as campus minister at Cretin-Derham Hall in St. Paul, Minn., and directs the CDH Liturgical Choir.