| 1988 | Opera California Founded |
| 1990 | AUG 25: Mozart “Requiem” Performance and “A Night of Worship” |
| 1991 | JUN 24: Korean-American Opera California Youth Choir Founded |
| NOV 30: Opera Performance: “Amahl and the Night Visitors” - Gallery Theatre Barnsdall Park | |
| 1992 | JULY 25: Opera California Youth Choir’s 1st Annual Musical Performance of “Adam’s Apple" at the Immanuel Presbyterian Church |
| NOV 10: Opera Performance with Torrance Symphony Orchestra of La Boheme” at the Historical Wilshire Ebell Theatre. | |
| 1993 | JUL 31: Opera California Youth Choir’s 2nd Annual Musical Performance of Musical “Psalty 6” at the Korean Culture Center |
| SEP 26: 15th Annual Interdenominational Festival of Sacred Music Performance | |
| 1994 | MAR 5: Korea Town Police Department Fundraiser Performance |
| SEP 25: 16th Annual Interdenominational Festival of Sacred Music Performance | |
| 1995 | APR 30: 3rd Annual “International Choral Festival” Performance |
| DEC 09: “Farewell 1995 Concert” Performance in San Diego | |
| 1996 | MAY 04: KIIS FM Fundraiser “Cinco De Mayo Festival” Performance |
| JUL 14-16: Performance at the Palace of Fine Arts, San Francisco, CA. | |
| 1997 | MARCH: Opera Performance: “Le Nozze Di Figaro” |
| DEC 24: Performance at the annual “L.A County Holiday Festival”, Dorothy Chandler Pavilion Music Center | |
| 1998 | JUL 18: Opera California Youth Choir’s Annual Musical Performance of Musical Performance: “Psalty” in the city of San Diego |
| 1999 | MAR 06: Outreach “Gospel Concert” to benefit local drug rehabilitation center. |
| JUL 10: Opera California’s 10th Anniversary Concert | |
| 2000 | JAN 08: African American Outreach Performance “Martin Luther King’s Day Celebration” - Second Baptist Church |
| JUL 23: “Children’s Concert of Praise” African American Outreach, Church of Christian Fellowship United Church of Christ | |
| 2001 | JAN 20: “Martin Luther King Celebration” - Trinity Baptist Church |
| JUN 09: “Little Angel’s Choir” at Sarang Community Church of Southern California | |
| 2002 | JUN 18: Performance dedicated to children of Rwanda |
| JUL 13-14: Opera California Youth Choir’s 18th Annual Musical Performance of “Jesus” at the Historical Wilshire Ebell Theatre. | |
| 2003 | FEB 13-15: 2003 Rwanda, Congo Awareness and Support Charity Performance |
| MAY 04: Philip Roh and Women’s Choir Salvation Army Charity Concert | |
| 2004 | APR 25: Africa Missions Awareness and Support raising Concert |
| JUN 13: Africa Missions Concert - Korean Grace Church | |
| 2005 | JUL 16: Annual Opera California Youth Choir Musical Performance of “Father Knows Best” at the Historical Wilshire Ebell Theatre |
| AUG 2-9: Hawaii Missions Trip | |
| 2006 | MAY: The Sixth CD “Jesus Loves Me” Released. |
| AUG 11-14: Tacoma, Seattle Missions in support of World Vision | |
| 2007 | FEB 10: Disney Performing Arts On Stage Performance, Disneyland, CA |
| AUG 10-20: Peru Missions Trip | |
| 2008 | MAY 17: Outreach Concert - Pecan Park |
| JULY 19: The 24th Annual Opera California Youth Choir Musical Performance of “In God’s Time” at the Historical Wilshire Ebell Theater | |
| 2009 | MAR 28: Performance at the World Premiere Performance of Women’s Messiah Choir at the Salvation Army Tustin Ranch Church |
| AUG 18: The 25th Annual Opera California Youth Choir Musical Performance of “Gifted” at the Historical Wilshire Ebell Theatre | |
| 2010 | JAN 16: Disney Performing Arts On Stage Performance, Disneyland, CA |
| APR 25: Outreach Performance at Hispanic Church | |
| JUL 17: The 26th Annual Opera California Youth Choir Musical Performance of “Dreams” at the Historical Wilshire Ebell Theatre | |
| DEC 18: Opera California Youth Choir and Friends at Mijoo Peace Church | |
| 2011 | FEB 26: Disney Performing Arts On Stage Performance, Disneyland, CA |
| JUL 16: The 27th Annual Opera California Youth Choir Musical Performance of “We Are The World” | |
| AUG 5-8: Tour of Northern California, Sponsored by Christian Times | |
| DEC 3: Opera California Youth Choir Charity Concert | |
| 2012 | MAR 17: The 1st OCYC Praise Worship at Mijoo Peace Church |
| APR 01: Performance at the Artesia-Cerritos United Methodist Church | |
| JUN 02: 노형건 음악인생 40주년 기념콘서트 출연 | |
| JUL 14: The 28th Annual Opera California Youth Choir Musical Performance of “Come Onto Jesus” at Mijoo Peace Church | |
| JUL 26 - AUG 7: "Come Onto Jesus" Performance Tour in South Korea | |
| SEP 29: Messiah Concert at MacArthur Park | |
| DEC: Charity Concert | |
| 2013 | MAR 16: 노형건 힐링콘서트 출연 |
| JUL 13: The 29th Annual Opera California Youth Choir Musical Performance of “You Are Special” at the Zipper Hall, Colburn School of Music | |
| JUL 25-31: Orlando, Miami Mission Trip | |
|
DEC: Charity Musical Performance of “You Are Special” |
|
| 2014 |
APR 19: Performance at Disneyland, Anaheim, CA |
| 2015 | APR 19: Hmong Charity Concert JUL 11: The 31st OCYC Musical Performance, "The Sign" at the Alex Theatre |
| 2016 | JAN 30: Performance at Knott's Berry Farm, Buena Park, CA APR 23: San Diego CCC Performance JUN 5: LA Full Gospel Church Sunshine Foundation Support Performance JUL 9: The 32nd OCYC Musical Performance, "The Sign 2" at the Ford Theatre |
| 2017 | MAR 25: Performance at Knott's Berry Farm, Buena Park, CA APR 22: Fresno Hmong Outreach Performance JUL 15, 21: The 33rd OCYC Musical Performance, "The Big Picture" |
| 2018 |
JUL 7: The 34th OCYC Musical Performance, "The Big Picture" |
