April 7, 1959 - Fr. Louis Dierker was appointed first pastor of St. Simon the Apostle Parish.
June 21, 1959 - First Masses were held at Concord School during church construction. Summer 1959 - Dominican Order agreed to teach in the school. November 22, 1959 - Cornerstone was laid for the church and school. January 9, 1960 - Fr. Dierker moved into the rectory on Jackie Lane. August 1960 - Church construction was completed. September 1960 - School opened with four Dominican sisters, nine lay teachers and 518 students. Fall 1960 - First Holy Name and Madonna Guild meetings were held.
December 3, 1961 - Church and school dedication.
June 1970 - Parish Council was formed.
June 6, 1972 - Fr. Thomas Woracek was appointed the second pastor of St. Simon the Apostle Parish.
Fall 1972 - Groundbreaking for the new rectory on the parish grounds.
September 1973 - Parish School of Religion started.
March 1977- Remodeling started on the church.
December 7, 1977- First Mass was held in the newly remodeled church.
April 9, 1978- Dedication of the remodeled church.
October 28, 1984 - 25th Anniversary of St. Simon the Apostle Parish.
Fall 1984- Plans were developed for a school gym, library and adding a Kindergarten program.
June 1985 - Fr. William Ahrens was appointed the third pastor of St. Simon the Apostle Parish.
December 14, 1986- Groundbreaking was held for school expansion.
September 1987- First Kindergarten class was held.
January 17, 1988 - Dedication of the Monsignor Woracek Parish Center was held.
September 1995- Convent was converted to Simon Says Early Childhood Center.
Fall 1999 - St. Simon establishes a Youth Ministry Program
September 24, 2000- Groundbreaking for a new church started.
March 17, 2002- First Mass was held in the new church.
May 4, 2002- Dedication of new church by then Archbishop Justin Rigali.
June 23, 2003 - Fr. Mark Ebert was appointed fourth pastor of St. Simon the Apostle Parish.
April 2004- The new church building was paid off.
Summer 2007 - All the roofs of the school and gym were replaced and the school was air-conditioned.
June 17, 2008- Fr. Erich Fechner was appointed fifth pastor of St. Simon the Apostle Parish.
June 21, 2008 - Fiftieth Jubilee Year-Long Kick-off Celebration
December 2010- Parish endowment fund reached $1,000,000.
July 1, 2015 - Fr. Brad Modde was appointed sixth pastor of St. Simon the Apostle Parish
September 2022 - Middle School Youth Ministry Program Begins
August 1, 2023 - Fr. David Hogan was appointed seventh Pastor of St. Simon the Apostle Parish