| Art Club | 09/29/2017 4:30 PM - 5:30 PM |
| Arbor Day in Commerce City: Free seedlings | 04/20/2018 12:00 PM - 5:00 PM |
| Arbor Day at Eagle Pointe | 04/19/2024 8:00 AM |
| Arbor Day at Bison Ridge | 04/19/2024 8:00 AM |
| Arbor Day | 04/21/2023 8:00 AM - 5:00 PM |
| Application Deadline for Non-profit QCF Grants | 03/05/2021 |
| Anythink Startup Month: Small Business Marketing on a Budget | 09/07/2017 6:00 PM - 7:00 PM |
| Anythink Startup Month: Small Business Marketing on a Budget | 09/28/2017 6:00 PM - 7:00 PM |
| Anythink Startup Month: Small Business Marketing on a Budget | 09/21/2017 6:00 PM - 7:00 PM |
| Anythink Startup Month: Small Business Marketing on a Budget | 09/14/2017 6:00 PM - 7:00 PM |
| Anythink Library: Hispanic Heritage Month Celebration | 09/16/2023 1:00 PM - 4:00 PM |
| Anythink hosts special event with One Book 4 Colorado author | 04/10/2018 11:45 AM - 12:30 PM |
| Anime Club | 09/08/2017 4:30 PM - 5:30 PM |
| Anime Club | 08/11/2017 4:30 PM - 5:30 PM |
| All city facilities closed in observance of Thanksgiving Day | 11/23/2023 |
| All City Facilities closed in observance of 4th of July | 07/04/2024 |
| All city facilities closed for Thanksgiving Day | 11/24/2022 |
| All city facilities closed for Thanksgiving Day | 11/26/2020 |
| All city facilities closed for Thanksgiving Day | 11/25/2021 |
| Adams County Electronics Recycling Event | 04/01/2017 9:30 AM - 2:30 PM |
