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.
Attention non-profit service organizations!
If you are seeking a fun way to raise money for your group, why not participate as a food vendor, game booth operator, carnival ride operator, or bring awareness to the community about your organization with an information booth? Application Packets - Food Vendor • Game Vendor • Ride Vendor • Information Booth
Calling all Entertainers! If you have a desire to preform on stage then this event is for you. Applications for entertainment are now being accepted for local youth and adults to preform on stage during the event. Entertainment Application
Join the fun by entering your car in the Diamond Bar Car Show! This event is in conjunction with the City Birthday Party. The City is also seeking Volunteer Judges, please call 909.839.7072 if you are interested in additional information. Participant Entry Form and Waiver
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. Submit your nomination online or by mail (print Volunteer Nomination entry form).
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: