Events Calendar

December 2025

Thu 11

Thursday, Dec. 11, 2025 · 3:30 pm - 7:30 pm

Visit with Santa at the Callahan House

Explore the historic home, see the decorations and visit with Santa at the historic Callahan House in Longmont, CO

Thu 11

Thursday, Dec. 11, 2025 · 4 pm - 5 pm

Teen Taste Test: Fall and Winter Treats

Get a taste for something new this summer. We’ll taste test different treats from around the world in this program. Participants will have an opportunity to sample different flavored treats, rank their favorites, and compare with others.

Thu 11

Thursday, Dec. 11, 2025 · 4 pm - 5 pm Glam Group Series

Glam Group (12/11/2025)

Longmont Youth Center 1050 Lashley St., Longmont, CO, United States

Thu 11

Thursday, Dec. 11, 2025 · 4 pm - 5 pm Youth Original Recording Studio Series

Youth Original Recording Studio (12/11/2025)

Longmont Youth Center 1050 Lashley St., Longmont, CO, United States

Thu 11

Thursday, Dec. 11, 2025 · 4 pm - 8:30 pm

Art & Sip: Alcohol Ink Sunrise

Longmont Museum 400 Quail Rd., Longmont, CO, United States

Thu 11

Thursday, Dec. 11, 2025 · 6 pm - 7:30 pm

Vision Zero Task Force Meeting

Longmont Senior Center 910 Longs Peak Ave., Longmont, CO, United States

Thu 11

Thursday, Dec. 11, 2025 · 7 pm - 9 pm

Short Films from the 2025 Boulder International Film Festival Pt. II

Longmont Museum 400 Quail Rd., Longmont, CO, United States

Our second round of shorts made by filmmakers from across the globe as selected for inclusion in the 2025 Boulder International Film Festival. 

Fri 12

Friday, Dec. 12, 2025 · 9 am - 8 pm

Friends of the Longmont Library (FOLL) Book Sale

Longmont Public Library 355 Emery St., Longmont, CO, United States

Fri 12

Friday, Dec. 12, 2025 · 9:15 am - 2:15 pm Discovery Days Art Series

Discovery Days Art (12/12/2025)

Longmont Museum 400 Quail Rd., Longmont, CO, United States

Fri 12

Friday, Dec. 12, 2025 · 2:30 pm - 4:30 pm

Friday Afternoon Concert: Flatirons Jazz Orchestra

Longmont Museum 400 Quail Rd., Longmont, CO, United States

Join us as we go back in time and enjoy a swinging afternoon with this traditional 18-piece big band.

Fri 12

Friday, Dec. 12, 2025 · 4 pm - 5 pm All Out League Series

All Out League (12/12/2025)

Longmont Youth Center 1050 Lashley St., Longmont, CO, United States

Fri 12

Friday, Dec. 12, 2025 · 5 pm - 8 pm

Longmont Lights Holiday Festival

Roosevelt Park 700 Longs Peak Ave., Longmont, CO, United States

Sat 13

Saturday, Dec. 13, 2025 · 9 am - 5 pm

Friends of the Longmont Library (FOLL) Book Sale

Longmont Public Library 355 Emery St., Longmont, CO, United States

Sat 13

Saturday, Dec. 13, 2025 · 9:15 am - 2:15 pm Discovery Days Art Series

Discovery Days Art (12/13/2025)

Longmont Museum 400 Quail Rd., Longmont, CO, United States

Sat 13

Saturday, Dec. 13, 2025 · 9:15 am - 2:15 pm

Ornaments & Keepsakes Big-Kids Day at Discovery Days

Longmont Museum 400 Quail Rd., Longmont, CO, United States

Sat 13

Saturday, Dec. 13, 2025 · 10:30 am - 11:30 am English Conversation Group Series

English Conversation Group (12/13/2025)

Longmont Public Library 355 Emery St., Longmont, CO, United States

Practice English conversation with others in an informal, conversational setting. Some English experience suggested, but all welcome.

Sat 13

Saturday, Dec. 13, 2025 · 5 pm - 7 pm

Longmont Lights Holiday Parade

Roosevelt Park 700 Longs Peak Ave., Longmont, CO, United States

Sun 14

Sunday, Dec. 14, 2025 · 2 pm - 3 pm

Dogs Enjoy Afternoon Reading (D.E.A.R.)

Longmont Public Library 355 Emery St., Longmont, CO, United States

Mon 15

Monday, Dec. 15, 2025

Youth Basketball League Registration Deadline

Recreation Center 310 Quail Rd., Longmont, CO, United States

Mon 15

Monday, Dec. 15, 2025 · 3 pm - 5 pm Water Advisory Board Series

CANCELLED Water Advisory Board