Hazel Miller Band at Full Cycle Café: 6:30 p.m. Saturday, Full Cycle Café & Bar, 2355 30th St., Boulder. Hazel Miller is an iconic Colorado singer and band leader who has sung with or opened dozens of popular artists. The Hazel Miller Collective will regale listeners with an evening of her incomparable repertoire of soul, pop and R&B. $20-$25, fullcyclecafebar.eventcalendarapp.com.

Tax Help Colorado: 10 a.m. Saturday, Boulder Public Library, 1001 Arapahoe Ave., Boulder. Tax Help Colorado is offering free tax help to individuals and households making less than $67,000 in 2024. Appointments are strongly encouraged but not required, and may be made up to 30 days in advance. calendar.boulderlibrary.org.

Needle Felting Jewelry with Luna Cultura: 2 p.m. Saturday, Boulder Public Library, 1001 Arapahoe Ave., Boulder. Create soft beautiful needle felted jewelry with Luna Cultura. Get inspired by Mother Earth, community and wellness. This program is for children ages 7-14 years old. Participants under 12 should be with a responsible adult. Registration is required for children, only. This program will be conducted in English and Spanish. calendar.boulderlibrary.org.

Celtic Harp Concert at NoBo: 3:30 p.m. Saturday, NoBo Corner Library, 4600 Broadway, Boulder. Celtic singer/percussionist Beth Gadbaw and Celtic harpist/vocalist Margot Krimmel present Celtic music. They are known for their tight harmonies and thoughtful arrangements. This concert will also feature harp duets. calendar.boulderlibrary.org.

“Burden of Dreams” film screening: 5:30 p.m. Saturday, Dairy Arts Center, 2590 Walnut St., Boulder. “Burden of Dreams” captures legendary director Werner Herzog’s filming of his most ambitious film “Fitzcarraldo,” in which an entrepreneur (Klaus Kinski) endeavors to push a steamship over a mountain to build an opera house deep in the Amazon jungle. $12, thedairy.org.

Third annual Greatest .5k Ever: 9:30 a.m. Sunday, Sanitas Brewing Co, 3550 Frontier Ave., Boulder. It’s a .5k! Break the Dry January streak with a super fun run and beer at Sanitas Boulder. This will be a frosty fun run around the back lot of the brewery. Free, fb.me.

Boulder Friends of Jazz Jam Session: 1 p.m. Sunday, Avalon Ballroom, 6185 Arapahoe Road, Boulder. Come listen, play and dance to vintage jazz of the ’20s, ’30s and ’40s. $2-$12, 303-449-1888.

Celebrate Groundhog Day Lego Build-Along: 2 p.m. Sunday, Boulder Public Library, 1001 Arapahoe Ave., Boulder. With tens of thousands of LEGO pieces and the guidance of an experienced Play-Well instructor, participants will be able to build a groundhog. Power up engineering skills with Play-Well TEKnologies and tens of thousands of LEGO parts. Apply real-world concepts in physics, engineering and architecture through engineer-designed projects. Design and build as never before and explore crazy ideas. For ages 6-11, registration required for children attendees only. calendar.boulderlibrary.org.

Film Social: 2 p.m. Sunday, Boulder Public Library, 1001 Arapahoe Ave., Boulder. Watch “Reading Rainbow,” the award-winning series hosted by LeVar Burton that sparks a love for reading. There will be snacks, a marathon and reading fun in the Canyon Theater. Closed captions provided. Rated TV-Y. calendar.boulderlibrary.org.