City Birthday Party

Saturday, April 8, 2017


Event Flyer (PDF)

The annual birthday party, held each April at Pantera Park is the culmination of an innovative partnership between the City, community organizations, school districts, law enforcement agencies, local businesses, and non-profit service agencies.

Considered the City's largest annual event, the party celebrates the cultural diversity of the community and the red-white-and-blue "Spirit of Diamond Bar."

The event features rides, games, food, entertainment, a car show, a business showcase, and birthday cake for everyone. CASH ONLY EVENT, NO BILLS OVER $20 ACCEPTED.


Attention non-profit service organizations!
Join us in celebrating 28 years of incorporation! Attention non- profit service organizations: If you are seeking a fun way to raise money for your group, why not participate as a game booth operator, carnival ride operator, or bring awareness to the community about your organization with an information booth.

For more information please contact Recreation Supervisor Andee Tarazon at 909.839.7067 or

Performance Opportunity
The opportunity to perform on stage at the City Birthday Party is open to Diamond Bar individuals with brief pre-rehearsed solo or group performance or demonstration routine. Examples: individual or group singers, dance groups, martial arts groups, gymnastics groups, cheerleading groups, and sketch comedy.

Outstanding Volunteer Awards
In conjunction with the birthday party, the City honors adults and youth for their good deeds or community service with a special award from the City Council. You may print and send in the nomination form to City Hall or complete an electronic version that is automatically forwarded to the staff person overseeing the award program. 

You may also submit your nomination online  Deadline for nominations extended to March 10.

Business Expo
Open throughout event hours, this expo is a 
great way for businesses from all sectors to get exposure, and event attendees to learn about the services, products and special promotions available in the area. Businesses may secure space by contacting the Regional Chamber of Commerce - San Gabriel Valley at 626.810.8476 or

Car Show
Car show participants receive a logo-branded t-shirt and giveaways. Several awards will be issued, and all participants will be automatically entered into a raffle for a chance to win one of several prizes. Early registration fee: $20, Day Of: $25, depending on space availability. For more information or to register, contact Cloris Vargas at 909.839.7068 or

Event Volunteer Information              
The City is looking for local high school students to help with the operation and clean up of the City Birthday Party.  You must be in high school and attend Diamond Bar or Diamond Ranch High School or live in Diamond Bar.  School identification or proof or residence will be required.  All volunteers must be wearing closed toed shoes to volunteer and check in at the Red canopy marked first aid and event information.  Volunteers are welcomed from 8am-7pm.

Event contact information:

  • General Event Info: 909.839.7070
  • Food, game, carnival ride and a non-profit organization information booth: 909.839.7067
  • Car Show: 909.839.7068
  • Business Showcase: Contact the Regional Chamber of Commerce - San Gabriel Valley at 626.810.8473.


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