July 2026
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- First Day of ADSY Classes
Revised source verifiedHarris County · Traditional independent school district
Aldine ISD ADSY Calendar 2026-2027
Ermel, Harris and Vines use Aldine ISD’s Additional Days School Year calendar, running July 27-June 17 with 23 ENVI21ON school days.
The 2026-2027 Additional Days School Year calendar applies to Ermel, Harris and Vines. Classes begin Monday, July 27, 2026, and end Thursday, June 17, 2027. The calendar also marks 23 ENVI21ON school days from August through March.
Official calendar checked Official district source
Official calendar
Aldine ISD 2026–2027 Additional Days School Year (ADSY) key dates
| Event | Date | Status |
|---|---|---|
| First Day of ADSY Classes | School opens | |
| Student Holiday / Staff Development | No classes | |
| Labor Day Holiday | No classes | |
| October Student Holiday | through | No school |
| Thanksgiving Break | through | No school |
| Midwinter Break | through | No school |
| Student Holiday / Staff Development | No classes | |
| Martin Luther King Jr. Holiday | No classes | |
| February Student Holiday | through | No school |
| Spring Break | through | No school |
| Student Holiday | No classes | |
| Memorial Day Holiday | No classes | |
| Last Day of ADSY Classes | School closes |
Month by month
Aldine ISD 2026–2027 Additional Days School Year (ADSY) 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
August 2026
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- Student Holiday / Staff Development
September 2026
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- Labor Day Holiday
October 2026
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- October Student Holiday
November 2026
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- Thanksgiving Break
December 2026
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- Midwinter Break
January 2027
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- Student Holiday / Staff Development
- Martin Luther King Jr. Holiday
February 2027
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- February Student Holiday
March 2027
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- Spring Break
- Student Holiday
April 2027
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
May 2027
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- Memorial Day Holiday
June 2027
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
- Last Day of ADSY Classes
Planning notes
Aldine ISD 2026–2027 Additional Days School Year (ADSY) calendar notes
School calendar overview
The 2026–2027 Additional Days School Year (ADSY) school calendar begins Jul 27, 2026 and ends Jun 17, 2027.
Before you plan
Confirm October 5 and January 5 attendance directly with Ermel, Harris or Vines: the official ADSY calendar is unclear about those dates. This independent reference is not operated by Aldine ISD. Your campus remains the source for daily schedules and later changes.
Major school breaks
- October Student HolidayOct 12 – 16, 2026
- Thanksgiving BreakNov 23 – 27, 2026
- Midwinter BreakDec 21, 2026 – Jan 1, 2027
- February Student HolidayFeb 8 – 12, 2027
- Spring BreakMar 15 – 19, 2027
School year by the numbers
- Total no-school weekdays
- 36 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
- 2 days
- Calculated from official datesCounts weekdays without regular classes outside holidays and multi-day breaks, including staff or planning days. Overlapping entries count once.
- Longest listed break
- 17 consecutive days
- Calculated from official datesDec 19, 2026–Jan 4, 2027, including weekends. The stretch contains 11 confirmed no-school weekdays.
- Long weekends
- 5
- 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
- 5 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
- ADSY starts July 27, sixteen calendar days before the traditional first day on August 12.
- ADSY ends June 17, fourteen calendar days after the traditional last day on June 3.
- Ermel, Harris and Vines use the ADSY calendar; most Aldine ISD campuses follow the traditional instructional calendar.
- The October and February student breaks each cover a full Monday-through-Friday week.
- ENVI21ON school days are scheduled on 23 separate dates between August 5 and March 31.
Editorial summary
How the revised Aldine ISD ADSY calendar works
Aldine ISD’s 2026-2027 Additional Days School Year calendar applies to Ermel, Harris and Vines. Classes begin Monday, July 27, 2026, and end Thursday, June 17, 2027 — earlier and later than the district’s traditional calendar. The ADSY calendar also includes 23 ENVI21ON school days from August through March.
Major breaks include October 12-16, Thanksgiving week, midwinter break December 21-January 1, February 8-12, and spring break March 15-19. The calendar also lists Labor Day, Martin Luther King Jr. Day, March 26 and Memorial Day as student holidays.
ADSY is a longer school year used at selected Aldine campuses, not a second districtwide calendar. Separately, Aldine ISD says the program provides 30 additional instructional days, with more time for personalized instruction, project-based learning and enrichment.
Common questions
Aldine ISD 2026–2027 Additional Days School Year (ADSY) calendar FAQs
Which schools use the 2026-2027 Aldine ISD ADSY calendar?
Ermel Elementary, Harris Elementary and Vines Primary use the current revised ADSY calendar. Most other Aldine ISD campuses follow the traditional instructional calendar.
What does ADSY mean in Aldine ISD?
ADSY stands for Additional Days School Year. Aldine ISD uses the longer calendar at selected campuses to provide additional learning time and enrichment opportunities.
When do ADSY students start school?
Students at Ermel, Harris and Vines begin Monday, July 27, 2026.
What is the final day for ADSY classes?
The last day of classes is Thursday, June 17, 2027. The fourth grading period ends the same day, and final report cards are scheduled for June 25.
What are ENVI21ON school days?
ENVI21ON dates are designated school days on the Aldine ISD ADSY calendar. They are not holidays; students at Ermel, Harris and Vines attend school on those dates.
Which dates are marked as ENVI21ON days?
The PDF marks Aug. 5, 12, 19 and 26; Sept. 2, 16 and 23; Oct. 7, 21 and 28; Nov. 11 and 18; Dec. 2 and 9; Jan. 6, 13 and 27; Feb. 3, 17 and 24; and Mar. 3, 10 and 31.
Why does the ADSY calendar show 23 ENVI21ON days if Aldine ISD says the program adds 30 instructional days?
Aldine ISD’s revised 2026-2027 ADSY calendar marks 23 dates as ENVI21ON School Days, while a July 2026 district article says the ADSY program provides 30 additional instructional days. The calendar and article do not explain how the two counts relate, so they should not be used interchangeably.
Which ADSY staff-development days are no-school days for students?
August 10, 2026, and January 4, 2027, are marked as Student Holiday / Work Days. February 8 is a staff-development day within the February 8-12 student break.
When is fall break on the Aldine ISD ADSY calendar?
Students are off October 12-16, 2026. They return Monday, October 19, which is also the start of the second grading period.
When is Thanksgiving break for ADSY students?
Thanksgiving break covers November 23-27, 2026. It is a full Monday-through-Friday week, with classes resuming November 30.
When is ADSY winter break?
Midwinter break runs December 21, 2026, through January 1, 2027. January 4 is a separate Student Holiday / Work Day.
Is there school on January 5, 2027, for ADSY students?
The revised ADSY calendar is unclear about January 5. The third grading period begins January 5, while January 6 is listed as Classes Resume and is marked as an ENVI21ON school day. Families should confirm January 5 attendance with Ermel, Harris or Vines.
What are the February no-school dates?
ADSY students have no classes February 8-12, 2027. The first day is also used for staff development, but the entire week is a student holiday.
When is ADSY spring break?
Spring break is March 15-19, 2027. Students return March 22 and then have a separate student holiday Friday, March 26.
Which single-day holidays are no-school days on the ADSY calendar?
Students are off for Labor Day on September 7, Martin Luther King Jr. Day on January 18, the March 26 student holiday, and Memorial Day on May 31.
What are the ADSY grading-period dates?
The four grading periods listed on the ADSY calendar are July 27-October 9, October 19-December 18, January 5-March 12, and March 22-June 17.
When are ADSY report cards scheduled?
ADSY report cards are scheduled for October 23, 2026, and January 11, March 29 and June 25, 2027. June 25 falls after the June 17 last day of classes.
How is ADSY different from the traditional calendar?
ADSY begins July 27 instead of August 12, ends June 17 instead of June 3, and includes the specially marked ENVI21ON dates for the three participating campuses.
Does the revised ADSY calendar list any half days?
The revised ADSY calendar does not identify a half day for students. The December 18 half day on the traditional calendar should not be assumed to apply to ADSY campuses.
Does the ADSY calendar list any inclement-weather make-up dates?
No specific inclement-weather date is identified on the current revised ADSY calendar, even though its key includes that category.
Should Smith Elementary families use this ADSY calendar?
The current revised ADSY calendar names Ermel, Harris and Vines, not Smith. Aldine ISD’s January 2026 announcement also listed Smith, but the district later reported a June 9 board-approved calendar amendment for the three current campuses. Smith families should follow their campus’s current calendar rather than the earlier four-campus announcement.
Where is the official ADSY PDF?
The revised June 3, 2026, ADSY PDF is linked on this page. The Aldine ISD calendar page is the best place to check for a later revision.
Is there school on October 5, 2026, for ADSY students?
The calendar lists staff development on October 5 but does not clearly identify the date as a student holiday. Families should confirm attendance with Ermel, Harris or Vines.
Reference
Aldine ISD 2026–2027 Additional Days School Year (ADSY) resources
Aldine ISD official website
District news, schools, enrollment, transportation, meals, and family resources.
Aldine ISD calendar page
Official calendar downloads and district updates.
Official 2026-2027 ADSY Calendar PDF
The revised ADSY calendar for Ermel, Harris, and Vines with ENVI21ON dates, breaks, grading periods, and report cards.
Traditional 2026-2027 Instructional Calendar
The district calendar used by most Aldine ISD campuses.
Source and scope
About the Aldine ISD 2026–2027 Additional Days School Year (ADSY) calendar
Data source
Dates come from Aldine ISD’s ADSY Calendar for Ermel, Harris and Vines, updated June 3, 2026, and the official Calendar page. District announcements document the earlier four-campus version, the June board amendment and the current three-campus model.
How dates are handled
The entire calendar applies to Ermel, Harris and Vines, rather than a narrower event gradeScope. The 23 ENVI21ON school days are the dates with full red rectangles, including January 6; September 30 is unmarked. January 5 has the Nine Weeks Start/End half-circle, not an ENVI21ON rectangle, and its grading-period start conflicts with the January 6 Classes Resume date. October 5 has a staff-development listing without a matching student-holiday mark. Both unresolved dates remain in attendanceUncertaintyDates, with no assumed closure or attendance event and no calculated attendance total. Other statistics count only confirmed closures.
Updates
Earlier January materials included Smith. The district reported that trustees approved an ADSY calendar amendment for Ermel, Harris and Vines on June 9, 2026. This calendar follows the current three-campus PDF and should be rechecked if Aldine ISD resolves the October 5 or January 5 attendance questions.
Disclaimer
Confirm October 5 and January 5 attendance directly with Ermel, Harris or Vines: the official ADSY calendar is unclear about those dates. This independent reference is not operated by Aldine ISD. Your campus remains the source for daily schedules and later changes.
Aldine ISD 2026–2027 Additional Days School Year (ADSY) sources & verification
Source confirmed- District
- Aldine Independent School District
- Aldine ISD 2026-2027 ADSY Calendar for Ermel, Harris, and Vines
- View official source
- Aldine ISD Calendar
- View official source
- Aldine ISD trustees approve academic calendars for 2026-2027
- View official source
- Aldine ISD June board meeting: ADSY calendar amendment
- View official source
- ADSY campuses welcome students back for another year of growth and learning
- View official source
- Source last checked
- Revision count
- 1