In Erika Krouse's best-selling novel, "Contenders," Nina Black is a happy thief and street fighter until her past comes back to haunt her all while she becomes the guardian of an unexpected orphaned niece. Join us as Krouse reads from "Contenders" and discusses the challenges of writing characters who veer from the norm, 7 p.m., Chautauqua Community House, 301 Morning Glory Drive, Boulder; $7-$10; 303-440-7666 or chautauqua.com.
"Il Trovatore" International superstars Dmitri Hvorostovsky, Anita Rachvelishvili, Lianna Haroutounian and Gregory Kunde lead a superb cast of world-class singers in this Verdi classic.
Il trovatore is one of the great operas of the Romantic period, a story of passion and blood, love and vengeance, disaster and murder, 1 p.m., Dairy Arts Center, 2590 Walnut St., Boulder; $6-$11; 303-444-7328
"Deconstructing the Beatles: Sgt. Pepper" The Beatles' Sgt. Pepper's Lonely Hearts Club Band is one of the most influential albums of our time. Rolling Stone described it as "the most important rock & roll album ever made, an unsurpassed adventure in concept, sound, songwriting, cover art and studio technology by the greatest rock & roll group of all time."In Deconstructing Sgt. Pepper's Lonely Hearts Club Band, composer, musician, and Beatles expert Scott Freiman looks at Sgt. Pepper from multiple angles, exploring the history behind the music. Mr. Freiman conducts an educational journey into the creative process of The Beatles performances and recording sessions, 7 p.m., Dairy Arts Center, 2590 Walnut St., Boulder; $6-$11; 303-444-7328
"The Widowmaker" This, the most important documentary film of our time, exposes the "thought leaders" who have been, and still are, suppressing the single most effective technology to find and quantify heart disease long before heart attacks happen. Because of this cover up, over the past 30 years more than 4 million Americans have died of heart attacks. The vast majority of them could have been saved. If you are within 6 degrees of separation of someone who died of a sudden death heart attack, this film is a must see, 5:30 p.m., The Nomad Playhouse, 1410 Quince Ave., Boulder; 303-443-7510 or bit.ly/2lxtd8c.
From Our Lands To Your Hands This event is a hands-on opportunity for people to become better connected with local farmers and ranchers who produce local food and ingredients for many products we use daily, and learn how those farmers conserve the land for future generations. Betgaranti Local farmers, ranchers, and other experts in the agriculture industry will share their passion and knowledge of where our food comes from and how it is grown, 5 p.m., Boulder County Fairgrounds, 9595 Nelson Road, Longmont; free; bouldercounty.org/pages/history.go(-1);.
Tips and Tricks for Shooting Pro Video If you'd like to know some cool tips on how to get the most out of your video camera, along with learning some cool lighting tricks, it's time to set yourself apart from the amateurs with professional audio, lighting, and production techniques. Presented by Michael Scalisi, 6 p.m., Boulder Digital Arts, 1600 Range St., Boulder; $69-$89; 303-800-4647 or boulderdigitalarts.com/training/details.php?offering=32.
Niwot, Now & Then - Raptors Over Niwot Raptors Over Niwot: "The Eagle in Chief Niwot's Time and Ours" - The lecture will briefly highlight various Native American totems or spiritual symbols, including bison, wolf, hawk and rave, and will dwell primarily on Golden Eagles, 7 p.m., The Left Hand Grange, 195 Second Ave., Niwot; $5; niwot.com/events/niwot-now-then-1-1.
The State of our State of Mind Address: An Opportunity to Engage in Non-Partisan Subtle/Sacred Activism Martin Luther King Jr. had a dream and this wasn't it! Now that the impact of the Trump presidency is sinking in, some of us found ourselves sinking along with it. Since one way to illuminate the darkness is to make light of it, we'll begin the evening with some political stand-up comedy on our current political situation, 7 p.m., The Caritas Center, 5723 Arapahoe, Boulder; $10; 303-449-3066 or caritascenter.org.
A Line Skirt class In this confident beginner sewing class you'll learn how to read and use a commercial sewing pattern, cut fabric from a pattern, install an invisible zipper, line and hem a garment, and other basic sewing skills while you make a flattering A-line skirt, 10:30 a.m., Fabricate, 2017 17th st, Boulder; $50; 303-997-8245 or fabricateboulder.com/event/a-line-skirt-3.
Sphere Ensemble 2 p.m., Dairy Arts Center, 2590 Walnut St., Boulder, $10-$15; thedairy.org
Unplugged Drop-In Acoustic Jam 6 p.m., 300 Suns Brewing, 335 First Ave., Unit C, Longmont; 300sunsbrewing.com
Aya Maguire 6:30 p.m., Still Cellars, 1115 Colorado Ave., Longmont; stillcellars.com
Jack Hadley 7 p.m., Rosalee's Pizzeria, 461 Main St., Longmont; rosaleespizzeria.com
Open Mic Night 7 p.m., Sanitas Brewing Company, 3550 Frontier Ave., Unit 1, Boulder; sanitasbrewing.com
Yo-Yo Ma 7:30 p.m., Macky Auditorium, 1595 Pleasant St., Boulder, $60- $150; cupresents.org
Open Bluegrass Pick 8 p.m., Conor O'Neill's Irish Pub, 1922 13th St., Boulder; conoroneills.com
Billy Strings with The Lil' Smokies 8 p.m., The Fox Theatre, 1135 13th St., Boulder, $10-$15; foxtheatre.com
Reggae Night 9 p.m., Boulder House, 1109 Walnut St., Boulder; boulderhouse.co
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