KOCI Rockin' for Radio, a benefit concert for StarTree and KOCI, featuring Jumpin Jack Flash, will be held from 3 to 11 p.m. at the Westside Bar & Grill, 512 W. 19th St., Costa Mesa. Tickets are $10 in advance and $15 at the door. For more information and tickets, call (949) 646-5615.
Author Jeff Delaney
Author Jeff Delaney, of "Newport Beach: Then and Now," hosts a book signing from 2 to 4 p.m. at Lido Village Books, 3424 Via Oporto, Newport Beach. For more information, call (949) 673-2549.
The nonprofit CureDuchenne is hosting a fundraiser for a Duchenne cure starting at 5 p.m. at the Balboa Bay Club, 1221 Coast Hwy., Newport Beach. Tables and tickets are available by calling (949) 872-2552 or visiting http://www.cureduchenne.org.
Cinco de Mayo Celebration
Sonora Elementary School is having its Cinco de Mayo Family Fun Day from noon to 5 p.m. The campus is located at 966 Sonora Road, Costa Mesa. For more information, visit http://sonora.nmusd.us.