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This Church is our heavenly Father's house, a place of solace and grace, so feel at home. Enter reverently, pray quietly, sing joyfully, listen attentively, give cheerfully, and come back gladly. We are a welcoming Catholic Community called by God to live out the message of Christ in love and service to all people. If you are new to our Community, WELCOME!

St. Denis Catholic Community
2151 S. Diamond Bar Blvd.,
Diamond Bar, CA 91765

Phone:  (909) 861-7106  
Fax:      (909) 861-2697





We plan to livestream an 8:00 a.m. Mass every weekday (Monday through Saturday) and a 10:30 a.m. Mass every Sunday.  The livestream can be viewed on St. Denis's Facebook page, which you don't have to subscribe to.  Within one hour or so after each Mass, we plan to upload the video of the Mass to a different platform (currently Vimeo) with a link from our website.

At every Mass, we will pray St. Alphonsus Liguori's "Prayer of Spiritual Communion" and Archbishop José Gomez's "Prayer in the Time of the Coronavirus," both of which are available here.  Therefore, you may want to print out these prayers prior to Mass or have them handy as you watch the Mass.

In addition, we plan to livestream the liturgies for Holy Thursday, Good Friday, and Easter Sunday, and upload videos of several prayer services.  Of course, technical issues may lead to a change in plans.  Therefore, please check our website regularly for the latest information about our current and upcoming videos.


Monday's Mass (3-30-29, with Fr. John)

For this video, you may need to turn up the volume to the maximum level in order to hear everything.  We hope to be able to improve the sound quality of these videos by Friday, April 3.


Mass for the 5th Sunday of Lent (3-28-20, with Fr. John)​​​​​​

For this video, you may need to turn up the volume to the maximum level because one of our microphones did not record properly.  For a text version of Fr. John's homily, please click here.


Stations of the Cross for the Time of the Coronavirus (3-27-20, with Fr. John)



A Message from Fr. John (3-23-20)
“All things work for good for those who love God” (Romans 8:28)


Coronavirus Update on 3-22-20

No Masses at St. Denis Catholic Church

On March 19th, Governor Gavin Newsom issued an Executive Order that everyone in California (with a few exceptions) should stay home to limit the spread of the novel coronavirus.  In order to comply with this Executive Order, and for the safety of everyone, the church and Pastoral Office are closed.  

Therefore, please stay home and stay safe.

Until this Executive Order is lifted and life returns to normal or semi-normal, there will be no public Masses and no public gatherings or meetings at St. Denis.

Previously, Archbishop José Gomez dispensed all Catholics in the Archdiocese of Los Angeles from the obligation of attending Sunday Mass for the rest of March; and this dispensation likely will be extended into April.  Thus, no one is obliged to attend Sunday Mass through at least the end of this month (and likely beyond).

Until our Masses resume, you are encouraged to participate in the Holy Mass via the Internet.  The Archdiocese provides a livestream of non-public Masses celebrated by the priests from the Cathedral of Our Lady of Angels daily and on Sunday via Facebook, @lacatholics, ( or visit  The daily Mass (Monday through Friday) is in English and is livestreamed at 12:10 p.m.; and the Sunday Mass is livestreamed at 10:00 a.m. in English and at 12:30 p.m. in Spanish. 

When viewing a livestreamed Mass, please participate as much as you can—e.g., by saying the responses and prayers aloud and by standing, kneeling, and sitting at the appropriate times.

Although they can no longer celebrate public Masses, St. Denis’s priests are celebrating nonpublic Masses for the daily Mass intentions, for our parishioners and parish, and for our country and world, that this coronavirus pandemic will soon pass. 

For those who have scheduled weddings, funerals, baptisms, and Quinceaneras in March and April, someone has already called or will call them personally during the week of March 23 to discuss various accommodations and options.

For more information and updates, please check our website ( regularly.  Our next planned update will be on Monday, March 23 or Tuesday, March 24, after we have received updated guidance from the Archdiocese about how we should proceed under these extraordinary circumstances.

For the most updated information and resources on how to limit the impact of the coronavirus, please visit the Archdiocese’s emergency preparedness webpage,

During this time of trial, Archbishop Gomez has asked us to pray a “Prayer in the Time of the Coronavirus,” which is set forth below and which he wrote for this moment.  In addition, I recommend praying a Rosary Novena by praying the Rosary (along with the Archbishop’s prayer) for nine consecutive days.  Since many family members are staying home from work and school, you and your family could pray the Rosary Novena together, with a different person leading each decade of the Rosary.  (For instructions on praying the Rosary, please click here or here.)   

In this difficult time, God is still with us and hasn’t abandoned us.  May He help all of us to persevere and not lose faith; and may He bless you and your family. 

Sincerely yours in Christ,

Fr. John Palmer
St. Denis Catholic Church



Archbishop José Gomez invites every Catholic to make his or her commitment for 2020 to Together in Mission, which provides financial assistance to 67 poor parishes and 74 poor Catholic schools in the Los Angeles Archdiocese. 

This year, our parish has been asked to raise $129,494.  Last year, 488 parish donors helped us to raise $142,003; and we exceeded our goal for the first time in several years.  We sincerely thank everyone who contributed last year and who will contribute this year to Together in Mission.  

This year’s theme “Our Story is Alive” reminds us that our gifts to Together in Mission are an active demonstration of our faith and love for those in our Archdiocese who need our support.  Please make a pledge with the information that was mailed to your home, the pledge envelopes that are available in the pews, online at, or by calling 213-637-7672.

When making a pledge, please indicate that St. Denis is your parish so that your pledge and donations will count toward St. Denis's 2020 goal.

Your gifts to Together in Mission ensure that every Catholic living in the Archdiocese has a parish to celebrate their faith and access to a Catholic school education.  You are living your faith through your actions when you support Together in Mission. 

Thank you for your generosity.

Again, the website for Together in Mission is; and please do not forget to select St Denis as your parish.



Important notice

The 42nd Oberammergau Passion Play will be postponed due to the current situation caused by the corona pandemic. The basis for this is a decision of the district administration of Garmisch-Partenkirchen, which prohibits the performance of the event planned from 16.05.2020 to 04.10.2020. The health of our guests and participants is our highest priority, therefore the responsible persons have decided to postpone the premiere of the Passion Play, which was planned for 16 May 2020, until 2022. The premiere is now scheduled for May 21, 2022.

The health of the population is a top priority for the community of Oberammergau and the directing team around Christian Stückl as well. The Corona pandemic has made it impossible to complete this year's play without endangering the performers and guests. Furthermore, the perspective for this year is unclear. A postponement of only a few months seemed unacceptable to everyone involved.

Click here to see past St Denis events



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