August 2026
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- First Day of School
Official source verifiedTarrant County · Traditional independent school district
Arlington ISD High School A/B Calendar 2026-2027
Mondays and Wednesdays are A days; Tuesdays and Thursdays are B days. Fridays alternate. Check the dated A/B grid for Friday assignments and student holidays.
Arlington ISD uses A days on Mondays and Wednesdays and B days on Tuesdays and Thursdays for the 2026-2027 high school schedule. Fridays alternate between A and B. The calendar starts August 12. High school early dismissal is scheduled for December 17-18 and May 25-26.
Official calendar checked Official district source
Official calendar
Arlington ISD 2026–2027 High School A/B key dates
| Event | Date | Status |
|---|---|---|
| First Day of School | School opens | |
| Student and Staff Holiday | No classes | |
| Student Holiday | No classes | |
| Student Holiday / Parent Conferences | No classes | |
| Student and Staff Holiday | No classes | |
| Student and Staff Holiday | No classes | |
| Student Holiday | No classes | |
| Student and Staff Holiday | through | No school |
| Early Dismissal | through | Early dismissal |
| Student and Staff Holiday | through | No school |
| Student Holiday | through | No classes |
| Student and Staff Holiday | No classes | |
| Student Holiday / Parent Conferences | No classes | |
| Student and Staff Holiday | No classes | |
| Student Holiday | No classes | |
| Student and Staff Holiday | through | No school |
| Student & Staff Holiday / Bad Weather Make-Up Day | If needed | |
| Student & Staff Holiday / Bad Weather Make-Up Day | If needed | |
| Early Dismissal | Early dismissal | |
| Last Day of School / Early Dismissal | School closes |
Month by month
Arlington ISD 2026–2027 High School A/B monthly calendar
Highlighted dates follow the published calendar; grouped or inferred entries are labelled. Today is determined in Central Time (America/Chicago).
- School Day
- Weekend
- Holiday (No School)
- School Break
- First / Last Day
- Important Date
September 2026
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- Student and Staff Holiday
- Student Holiday
October 2026
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- Student Holiday / Parent Conferences
- Student and Staff Holiday
November 2026
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- Student and Staff Holiday
- Student Holiday
- Student and Staff Holiday
December 2026
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- Student and Staff Holiday
January 2027
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- Student Holiday
- Student and Staff Holiday
February 2027
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- Student Holiday / Parent Conferences
- Student and Staff Holiday
- Student Holiday
March 2027
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- Student and Staff Holiday
- Student & Staff Holiday / Bad Weather Make-Up Day
April 2027
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- Student & Staff Holiday / Bad Weather Make-Up Day
May 2027
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- Last Day of School / Early Dismissal
Planning notes
Arlington ISD 2026–2027 High School A/B calendar notes
School calendar overview
The 2026–2027 High School A/B school calendar begins Aug 12, 2026 and ends May 26, 2027.
Before you plan
Use the official A/B PDF and campus communications to confirm daily letter assignments, bell schedules and weather-related changes.
Major school breaks
- Thanksgiving holidaysNov 23 – 27, 2026
- Winter no-class periodDec 21, 2026 – Jan 5, 2027
- Spring breakMar 15 – 19, 2027
School year by the numbers
- Student attendance days
- 171 days
- Calculated from official datesCalculated by adding the PDF's published semester totals: 82 days in semester one plus 89 in semester two equals 171 days. This is a sum of the listed semester figures, not a count of individual calendar dates.
- Total no-school weekdays
- 32 weekdays
- Calculated from official datesCounted from districtwide no-class events between the first and last student days. Weekends and shortened school days are excluded, and overlapping events count once.
- Student no-school days
- 7 days
- Calculated from official datesCounts weekdays without regular classes outside holidays and multi-day breaks, including staff or planning days. Overlapping entries count once.
- Listed early-release dates
- 4 dates
- Calculated from official datesCounted from official early-release entries; some dates apply only to the grades or campuses named in the calendar.
- Longest listed break
- 18 consecutive days
- Calculated from official datesDec 19, 2026–Jan 5, 2027, including weekends. The stretch contains 12 confirmed no-school weekdays.
- Long weekends
- 4
- Calculated from official datesCounts three- or four-day no-school stretches formed by a weekend plus one or two confirmed weekday closures. Longer school breaks are excluded.
- Full-week breaks
- 3 breaks
- Calculated from official datesCounts continuous no-school stretches containing at least five confirmed weekdays without regular classes. Adjacent holidays and weekends remain part of the same break.
What to know
- The A/B PDF publishes 41 A days and 41 B days in semester one, followed by 45 A days and 44 B days in semester two.
- Friday assignments alternate rather than following a fixed weekday rule.
- The published semester subtotals add up to 86 A days and 85 B days across the year, not equal annual A/B totals.
Editorial summary
Using the Arlington ISD high school A/B calendar
The high school A/B calendar answers which class schedule to follow on each school day. Mondays and Wednesdays are A days, Tuesdays and Thursdays are B days, and Fridays alternate. Arlington ISD's May 2026 family newsletter says the pattern aligns with Tarrant County College's schedule and is intended to help students enrolled in dual-credit classes.
Use the dated PDF for each Friday assignment. Classes run August 12-May 26. Early dismissal is December 17-18 and May 25-26, with high school students leaving at 11:35 a.m. Holiday dates match the regular Secondary calendar, while Early College students follow a separate schedule.
The PDF lists 41 A days and 41 B days in the first semester, followed by 45 A days and 44 B days in the second.
Common questions
Arlington ISD 2026–2027 High School A/B calendar FAQs
When does the Arlington ISD A/B calendar start and end?
The first student day is Wednesday, August 12, 2026, and the last day is Wednesday, May 26, 2027.
Which weekdays are A days in Arlington ISD?
The published pattern assigns Mondays and Wednesdays as A days. Fridays alternate, so students should check the official calendar for each Friday.
Which weekdays are B days in Arlington ISD?
Tuesdays and Thursdays are B days. Alternating Fridays are printed individually on the official A/B PDF.
How do Friday A/B assignments work in Arlington ISD?
Fridays alternate between A and B schedules rather than following one fixed letter. The official PDF marks the assignment for every Friday.
How many A and B days are on the 2026-2027 calendar?
The PDF lists 41 A days and 41 B days in semester one, then 45 A days and 44 B days in semester two.
How many instructional days does the Arlington ISD A/B calendar list?
The PDF lists 82 instructional days in semester one and 89 in semester two. Those semester figures add up to 171 days.
When is Thanksgiving break on the A/B calendar?
Students have no classes November 23-27, 2026, and return Monday, November 30.
When do A/B students return after winter break?
Students return Wednesday, January 6, 2027. The December 21-January 1 holiday is followed by student holidays January 4-5.
When is spring break on the Arlington ISD A/B calendar?
Spring break runs March 15-19, 2027, and classes resume Monday, March 22.
Which dates have early dismissal on the A/B calendar?
Early dismissal is scheduled December 17-18, 2026, and May 25-26, 2027. High school hours on those dates are 7:35-11:35 a.m.
Does the Arlington ISD A/B calendar have a fall break?
It does not list a weeklong fall break. Students are off October 9 and October 12, creating a four-day no-class stretch with the weekend.
When are parent conferences for A/B students?
October 9, 2026, and February 12, 2027, are student holidays and parent-conference days. Campuses set the conference schedule.
Could A/B students have school on March 26 or April 23?
Yes, if a bad-weather make-up day is needed. Both dates are published as holidays unless Arlington ISD activates them for attendance.
What are regular high school hours in Arlington ISD?
The A/B calendar lists regular high school hours as 7:35 a.m.-3:00 p.m.
Does every Arlington ISD high school student follow the A/B calendar?
Families should confirm the assigned schedule with their campus. The district publishes the A/B rotation as a separate student calendar rather than replacing the general Secondary calendar.
Where can students check the exact A/B assignment for a date?
Use the official High School Student A/B Academic Calendar PDF. It marks individual A and B dates throughout both semesters.
Where can families download the official Arlington ISD A/B calendar?
The official student A/B PDF is linked on this page and from Arlington ISD's Calendars page.
Why did Arlington ISD change the A/B pattern for 2026-2027?
Arlington ISD's May 2026 family newsletter says the Monday/Wednesday A, Tuesday/Thursday B and alternating-Friday pattern aligns with Tarrant County College's schedule and is intended to help students enrolled in dual-credit classes.
Reference
Arlington ISD 2026–2027 High School A/B resources
Source and scope
About the Arlington ISD 2026–2027 High School A/B calendar
Data source
Dates and A/B assignments come from Arlington ISD's official 2026-2027 High School Student A/B Academic Calendar and the district calendar page.
How dates are handled
The page summarizes the weekly rotation without turning every A or B day into a separate event. Conditional make-up dates are excluded only under the current published schedule, not permanently. The PDF prints semester totals of 82 and 89; their sum is 171, marked derived. A weekday count using the dated grid and published holidays yields 82 in semester one and 90 in semester two (172 overall). The unresolved one-day difference is in semester two; no individual attendance date has been changed or inferred to force agreement. The stored attendance statistic uses the sum of the published semester figures. The May newsletter's equal-A/B statement is not used for annual totals: the PDF's listed subtotals sum to 86 A and 85 B.
Updates
Alternating Friday assignments and make-up-day use can change if Arlington ISD revises the calendar. This page was verified October 3, 2026.
Disclaimer
Use the official A/B PDF and campus communications to confirm daily letter assignments, bell schedules and weather-related changes.
Arlington ISD 2026–2027 High School A/B sources & verification
Source confirmed- District
- Arlington Independent School District
- 2026-2027 High School Student A/B Academic Calendar
- View official source
- Arlington ISD Calendars
- View official source
- Arlington ISD May 2026 Family Newsletter
- View official source
- Source last checked
- Revision count
- 0