Go Club for Kids and Teens: 1:30 p.m., Boulder Public Library, 1001 Arapahoe Ave., Boulder. Learn to play the ancient and mysterious board game known as Go. Developed 4,000 years ago in China, the rules are so simple they can be taught in a few minutes, but it can take a lifetime to master the game. Go boards are provided, and take-home sets made of cardboard are available for free. Ages 5 and up. calendar.boulderlibrary.org.

Why Conservation Matters talk: 4 p.m., Dairy Arts Center, 2590 Walnut St., Boulder. Spend an afternoon with Dr. Kevin Fitzgerald, veterinarian, comedian and dedicated conservationist, as he presents the importance of conservation efforts, shows footage of his work with endangered species and outlines what people can do to help make a difference. In addition, he will give some readings from his new book, “It Started With a Turtle.” $5-$30, 303-440-7826, thedairy.org.

The Backseat Lovers concert: 8 p.m., The Fox Theatre, 1135 13th St., Boulder. The Backseat Lovers are an indie rock band from Salt Lake City consisting of Joshua Harmon, Jonas Swanson, KJ Ward and Juice Welch. The band will bring new music to its live shows as well as fan favorites from its album “Waiting to Spill.” $49.50-$55, z2ent.com.

Paper & Spine Used Bookstore children’s book sale: 9 a.m. Monday, Boulder Public Library, 1001 Arapahoe Ave., Boulder. Paper & Spine Used Book Store at Boulder Public Library is a volunteer program that diverts from landfills. All revenue from sales goes directly towards library programs designed to engage and enrich the community. Paper & Spine is hosting its annual children’s book sale. All items will be on sale for $1, including board books, picture books, early reader, intermediate reader and teen. calendar.boulderlibrary.org.

“The Unruly Mystic — John Muir” film screening: 7 p.m. Monday, Dairy Arts Center, 2590 Walnut St., Boulder. Get ready to be inspired by the life and wisdom of environmental activist John Muir. This film explores the connection between nature and spirituality through the words of Muir, the founder of Yosemite National Park. In this expanded version, viewers will discover additional footage along the John Muir Way in rural Scotland, as well as interviews with US Park Ranger Shelton Johnson and other noted outdoor enthusiasts. $12, thedairy.org.

Earth Day Storytime: 4 p.m. Tuesday, Meadows Branch Library, 4800 Baseline Road, Boulder. Share books, sing songs and make a craft that teaches children the importance of treating the Earth with kindness. calendar.boulderlibrary.org.

Earth Day Hike and Yoga: 5:30 p.m. Tuesday, The Peoples’ Crossing Trailhead, 48 Pearl St., Boulder. Celebrate the Earth, and do yoga outside. Hike in for a short while with a mat, then set up for about 45 minutes of yoga before hiking back out to the trailhead. Registration required. $32, clients.mindbodyonline.com.

“The Poetry of Grief, Gratitude, and Reverence” book signing: 6:30 p.m. Tuesday, Boulder Book Store, 1107 Pearl St., Boulder. John Brehm will speak about and sign his new book “The Poetry of Grief, Gratitude, and Reverence”. $5, boulderbookstore.net.

Editor’s note: Availability and scheduling of events may be subject to change.