Adams County Colorado Schools Calendar

Seven school districts, from dense suburban systems along the I-25 and US-36 corridors to small prairie districts near the Eastern Plains, share the territory of Adams County, Colorado, and together they educate roughly 80,000 students. Because each district adopts its own calendar, the answer to “when does school start?” depends on which side of the county you live on. A family in Thornton and a family in Strasburg can be on noticeably different schedules.

School District Structure in Adams County

Colorado organizes public education through locally elected boards of education, and Adams County has no countywide school system. Instead, the following districts operate within its boundaries:

• Adams 12 Five Star Schools (District 12): serves Thornton, Northglenn, Westminster (northern portions), Broomfield-area neighborhoods, and unincorporated areas, and is the county’s largest district by enrollment.
• Brighton School District 27J: covers Brighton, Commerce City’s northern areas, Lochbuie-area communities, and fast-growing neighborhoods along the northeast corridor.
• Westminster Public Schools (District 50): serves central Westminster and nearby areas.
• Mapleton Public Schools (District 1): a compact district in the Welby and Derby area.
• Adams County School District 14: serves Commerce City and the Adams City area.
• Bennett School District 29J: a small, largely rural district on the Eastern Plains.
• Strasburg School District 31J: another rural Eastern Plains district along I-70.

Parts of the county’s southeastern edge fall within Aurora Public Schools (Adams-Arapahoe 28J), which is headquartered in neighboring Arapahoe County and publishes its own calendar. Each district is governed by an elected Board of Education, typically five to seven members. Board meetings are generally held monthly, with agendas posted in advance on each district’s website, and the superintendent serves as the board’s chief executive.

The county seat is Brighton, but the county government has no authority over school calendars. Every calendar decision belongs to the individual district board.

Academic Calendar Structure

Most Adams County districts begin the school year in mid-August, a bit earlier than many states, and finish in the last week of May or the first days of June. Adams 12, Brighton 27J, Westminster, and Mapleton generally follow this traditional pattern. Districts typically release the next year’s calendar in the spring, though some adopt a draft calendar a year or more ahead so families can plan vacations.

Most districts here use a two-semester structure, with the fall semester ending around the winter break and the spring semester starting in early January. Elementary schools frequently report progress by trimester or quarter, while middle and high schools more commonly use quarters or semesters. Check your school’s handbook, because the grading period shapes when report cards go out.

Colorado law sets minimum instructional time in hours rather than only in days. Districts generally must provide about 1,080 hours of instruction for secondary students and 990 for elementary students, which most districts meet with roughly 160 instructional days, depending on the length of the school day. Districts build their calendars to clear those totals with a cushion for weather days. Some rural districts on the Eastern Plains, where long bus routes shape the schedule, have experimented with four-day weeks that use longer days to meet the hours requirement. If you live in the Bennett or Strasburg areas, confirm the weekly schedule on the district site.

Bell times vary by district and even by school. As a general pattern, high schools start earliest or latest depending on the district’s bus routing, with elementary and middle schools staggered around them. Your school’s page or enrollment packet will list exact start and end times.

School Holidays and Breaks

Adams County districts observe a familiar set of breaks, though the details differ from district to district:

• Labor Day: observed on the first Monday of September, and most districts are closed.
• Fall break: some districts schedule a short break or a day or two off in October, often tied to parent-teacher conferences. Others do not.
• Thanksgiving break: typically the full week or Wednesday through Friday of Thanksgiving week.
• Winter break: usually about two weeks, spanning Christmas and New Year’s Day.
• Martin Luther King Jr. Day: observed on the third Monday of January.
• Presidents’ Day: commonly a day off in February, though a few districts build a longer midwinter break instead.
• Spring break: generally a week in March, often aligned with other Front Range districts, though some districts shift it to late March or April.
• Memorial Day: observed on the last Monday in May.

Colorado does not mandate a specific list of school holidays beyond the instructional-time minimums, so each board decides. Exact dates shift every year, so rely on the official district-adopted calendar rather than last year’s dates.

Comparing Calendars Across Districts and States

Because the county is split among so many districts, families sometimes need to line up two calendars, such as a child in one district and a cousin or a co-parent’s household in another. The same applies to families who move between regions. Anyone planning around the Adams County schools calendar can find that it differs from district to district. Parents who also follow a distant relative’s schedule, such as the Yuba County schools calendar in California, will notice that start dates, break lengths, and closure rules reflect each state’s own laws and climate. Comparing calendars early in the year helps with travel plans, childcare, and visits.

How to Find the Official Adams County School Calendar

Because no single office publishes a countywide calendar, go to the website of the district that serves your address. If you are unsure which district that is, check your property tax bill or ask the county assessor’s office or your city hall.

Calendars are normally approved at a regular Board of Education meeting in the spring, although some districts adopt multi-year calendars. Once approved, they are posted as PDFs or interactive calendars, usually under tabs labeled “Calendar,” “Families,” “Parents,” or “Community.” Many districts also sync their calendars to Google Calendar or iCal, so you can add them to your phone.

Individual schools often maintain their own supplemental calendars with concerts, conferences, assemblies, and athletic events. Check both the district calendar and your child’s school page, since a school’s schedule may include events that do not appear on the district version.

Early Release Days, Teacher Workdays, and Professional Development

Teachers in Adams County districts typically report several days before students for planning and training, and these workdays often fall in early August. Throughout the year, districts also schedule professional development days when students stay home and staff attend training. Many also set aside time at the end of each quarter or semester for grading and parent-teacher conferences.

Early release days, when students leave one to two hours early (or a half day) so teachers can collaborate or train, are common in some districts and rare in others. Districts communicate them through the school calendar, newsletters, automated phone calls and texts, and parent portals such as Infinite Campus, which many Colorado districts use. Colorado requires certain staff training, including topics such as child abuse recognition and mandatory reporting, but districts decide how to schedule it.

Emergency Closures and Weather Days

Adams County sits on the high plains east of the Rocky Mountains, so it is exposed to sudden spring snowstorms, bitter cold snaps, occasional wind events, and, in some years, wildfire smoke. Because the county stretches from dense suburbs to open farmland, road conditions can differ sharply between Thornton and Bennett, and districts weigh bus safety on rural and unplowed roads heavily.

Decisions are made by the superintendent or designee, usually early in the morning after consulting road crews, transportation staff, and weather forecasts. Choices include a full closure, a delayed start, or an early release. Districts post alerts through:

• Automated phone calls, emails, and text messages
• The district website and mobile app
• Social media accounts
• Denver-area television stations such as 9NEWS, Denver7, FOX31, and CBS Colorado, plus local radio

Makeup policies vary. Many districts build in extra instructional time or hours to absorb a few closures, and some use remote learning days instead of canceling instruction. Check your district’s policy, because a closure may mean an online assignment day rather than a day off.

Graduation and End-of-Year Schedule

Final exams for high school students typically take place in the final week or so of May, with some districts using a modified exam schedule. High school graduations across the county usually take place in mid to late May, often at district stadiums, event centers, or larger venues in the Denver metro area. Smaller rural districts may hold ceremonies on campus.

Elementary and middle schools often hold promotion or recognition ceremonies in the last week. Final report cards and transcripts are generally available through the district’s parent portal shortly after the term ends, although the exact date varies. Parents should confirm whether their portal remains accessible during summer.

Back-to-School and Registration Information

Families new to Adams County should begin by confirming their address and attendance zone. Colorado districts also run school choice enrollment, so families may apply to schools outside their neighborhood zone, typically during a winter window with decisions later in the spring. Dates vary by district.

Commonly required documents include:

• Proof of residency, such as a lease, utility bill, or mortgage statement
• Proof of the child’s age, such as a birth certificate
• Immunization records or an approved exemption
• Prior school records, if transferring

Most districts offer online registration, with support from a central enrollment office or from the school itself. School supply lists are generally posted in July or early August on school websites. Many schools also host meet-the-teacher nights or open houses in the days before classes begin, and these appear on the school calendar.

Special Programs and Their Calendar Implications

Several programs may follow slightly different schedules:

• Magnet and charter schools: Adams County has charter schools and specialty programs that set their own calendars within district approval. Some begin earlier or end later than the neighborhood schools.
• Early college and dual enrollment: Students taking classes through community colleges, such as Front Range Community College, follow the college’s academic calendar for those courses, which can differ from the K-12 schedule.
• Alternative schools: These may run flexible or extended schedules.
• Preschool: The Colorado Universal Preschool program serves four-year-olds statewide, and programs may follow different calendars from the K-12 schedule.
• Virtual options: Districts and statewide providers offer online programs, and their calendars may not match the traditional school year.

Athletics and Extracurricular Calendar Context

High school athletics in Colorado are governed by the Colorado High School Activities Association (CHSAA). CHSAA sets season dates, eligibility rules, and playoff schedules, which are separate from the academic calendar but interact with it. Fall sports begin in August, often before classes start or in the first week, and some contests fall on weekends or during breaks. Winter and spring seasons likewise bump against exam periods and spring break. Check athletic schedules separately from the academic calendar.

State-Level Calendar Requirements and How Colorado Law Governs Adams County

The Colorado Department of Education (CDE) administers state education rules, while the State Board of Education adopts regulations. Districts must meet the minimum instructional hours, and boards retain broad local control over when school starts, which holidays are observed, and how the calendar is structured. This local control is why neighboring districts in Adams County can have different starting dates and breaks. Districts can also seek approval to adjust their schedules, such as four-day weeks, as long as they meet the hours. Questions about state requirements can be directed to CDE.

Frequently Asked Questions

When does school start in Adams County, Colorado?
Most districts begin in mid-August, but start dates vary by district. Check the calendar for the district that serves your address.

When does school get out for summer?
Most districts finish in late May or early June, with high school graduations typically occurring in mid-to-late May.

How many days are in a school year?
Colorado sets minimum instructional hours rather than a flat day count. Most districts schedule about 160 days, but four-day-week districts differ.

How do I find out if school is cancelled today?
Check your district’s text or email alerts, website, and social media, or watch Denver TV stations such as 9NEWS, Denver7, FOX31, and CBS Colorado.

What is the spring break schedule?
Spring break is usually one week in March, though the exact week varies by district. Confirm on your district’s calendar.

How do I enroll my child?
Contact your district’s enrollment office or use its online registration. Bring proof of residency, proof of age, and immunization records.

Are there year-round schools in Adams County?
Most schools follow a traditional calendar, but a few schools or programs may run modified calendars. Ask your district.

Who do I contact about school calendar questions?
Contact your child’s school office first, then your district’s communications or central office. The board’s meeting agendas also show when calendars are adopted.