Comedian Brian Regan performs at 7:30 p.m. at the Pasadena Civic Auditorium, 300 E. Green St., Pasadena. Considered one of the top stand-up comedians in the country, Regan has appeared on “The Tonight Show Starring Jimmy Fallon,” as well as in the Netflix special “Nunchucks and Flamethrowers.” Tickets are $34 and up. Call (626) 449-7360 or visit visitpasadena.com/events.

Mt. Wilson Observatory, 100 Mount Wilson Redbox Road, Mt. Wilson, presents “Of Sound Before the Stars,” featuring music derived from cosmic microwave background. Guests may view the night sky through the facility’s 100-inch telescope. The program runs from 7 p.m. to midnight in the telescope dome. Admission is $100. Call (626) 440-9016 or visit mtwilson.edu.

The Pasadena POPS features Grammy and Tony-nominated vocalist and pianist Michael Cavanaugh singing songs of Elton John, including “Tiny Dancer,” “Rocket Man,” “Crocodile Rock.” Cavanaugh is backed by the POPS and a full back-up band. Larry Blank conducts. Gates open at 5:30 p.m. The concerts begin at 7:30 p.m. at the Arboretum, 301 N. Baldwin Ave., Arcadia. Tickets are $10 to $95. Call (626) 793-7172 or visit pasadenasymphony-pops.org.

Multi-platinum recording artist and songwriter Harriet Schock performs at 7 p.m. at Coffee Gallery Backstage, 2029 N. Lake Ave., Altadena. Tickets are $20. Call (626) 798-6236 or visit coffeegallery.com.

The Sierra Madre Playhouse “Off the Page” series of staged readings presents “A Thousand Clowns,” the story of the unconventional Murray, who tires of writing comedy for a children’s show and becomes unemployed. He is visited by bickering social workers and finds himself solving their problems as well as his own. It starts at 7 p.m. Free. Call (626) 355-4318 or visit sierramadreplayhouse.org.

J.C. Hyke’s Songwriter Serenade features Bill Leustig, Markika Gerrard, Doug Schmude, Kevin Campbell and David Serby at 7 p.m. at Matt Denny’s Ale House Restaurant, 145 E. Huntington Drive, Arcadia. No cover. Visit jchyke.com.

Pasadena-Foothills Association of Realtors Charitable Foundation hosts a wine tasting and auction fundraiser to support its philanthropic programs, from 5 to 9 p.m. at 388 Cordova St., Pasadena. Tickets are $50, available by calling (626) 795-2455 or at https://pfar.org/event/wine-2019/.

Carla Sameth discusses and signs “One Day on the Gold Line: A Memoir in Essays” at 7 p.m. at Vroman’s Bookstore, 695 E. Colorado Blvd., Pasadena. It tells the story of a lesbian, Jewish single mother raising a black son, examining life’s surprising changes that come through choice or circumstance, often out of nowhere. Call (626) 449-5320 or visit vromansbookstore.com.