How accurate are our dates?
A wrong spring break date can mean a flight booked for the wrong week, so we publish our checking, not just the dates. These numbers come from the same data that builds the site, as of September 29, 2026.
Districts published554across 47 states
Calendars7182026-27 and approved 2027-28
Read twice100%by two separate AI readings
With a link to the source100%the district’s own document
What every calendar goes through
- The district’s own document. We use the calendar published by the district itself, usually the board-approved PDF, never another calendar site. 457 of 718 calendars (64%) carry a school board approval we could confirm; the others show the district’s current published version.
- A first reading of every date, including color-coded grids and footnotes: first and last day, every break, holidays, teacher workdays, early release, weather make-up days and days off for some grades only.
- A separate second reading. A second AI reading (Anthropic’s Claude) that does not see the first one re-opens the source, re-reads every date, recounts the school days and looks for newer versions. A calendar is published only after this second reading.
- Automatic checks on every build. Federal holidays must fall on their real dates, winter break must include December 25, Thanksgiving break must include Thanksgiving Day, and where the district states its number of student days (341 calendars), our count from the listed dates must match it, or the reviewer must find the reason in the district’s own documents (for example staff days the district counts).
- Honest gaps. When the documents disagree or a date cannot be confirmed, the page says “Unconfirmed, check district site” next to it instead of guessing. 165 calendars currently carry such a flag.
- Daily source checks. Every source document is fetched again every day and compared with the version we verified; each district page shows the date of its latest check, and when a district changes its file, the dates are read again and the page shows the new verification date.
What the second reading caught
Errors in our own first reading, found by the separate second reading and fixed before anyone saw them:
| District | First reading | After the second reading | Settled by |
|---|---|---|---|
| Dublin Unified School District (CA) | Spring break Mar 15 to 19, 2027, from a draft calendar | Spring break Apr 5 to 9, 2027; winter break runs to Jan 4 | the board-approved 2026-27 calendar (Apr 14, 2026) linked on the district site |
| Livermore Valley Joint USD (CA) | Winter break ending Jan 1 | Winter break runs to Jan 4; school resumes Jan 5 | the calendar grid and its semester day counts |
| Central Unified School District (CA) | Winter break ending Jan 11 and a missed day off on Oct 12 | Winter break ends Jan 8 (Jan 11 is a teacher day); Oct 12 is a day off | the board-approved district calendar |
| Frisco ISD (TX) | Mar 26 and Apr 16 read as school days; holiday break ending Jan 1 | Both are “No School, Bad Weather Make-Up Day” (school only if needed); the break runs to Jan 4 | the district’s own calendar feed, linked on its calendar page |
| Frederick County Public Schools (MD) | Spring break Mar 30 to Apr 2, 2027 | Spring break Mar 26 to Apr 2, 2027 | the district’s Year at a Glance |
| Aldine ISD ADSY calendar (TX) | Staff day on Oct 5 | Staff day on Oct 12; Oct 5 is a school day | the calendar grid and two schools’ own calendars |
| Dallas ISD 2027-28 (TX) | Inclement weather days counted as school days | Days off unless they are needed | district news and the board-approved day count |
| Fayette County Public Schools (KY) | Three unexplained days off | “No Classes; Staff Work Day” | the district’s online calendar |
| Cherry Creek School District (CO) | K-8 conference days shown as no school for everyone | No school for grades K-8 only; high schools are open | the calendar legend and the high school calendar |
| Aurora Public Schools (CO) | Last day of school unclear (May 21 or May 27) | May 27, 2027; May 21 on the district page was left over from last year | the board-approved calendar |
| Poway Unified School District (CA) | Nov 16 treated as a school day for everyone | No school for high school students only | district news on the Feb 26, 2026 board change |
Dates that are easy to get wrong
Old versions of a calendar stay online long after a district revises it. These are the cases we see most:
- Hillsborough County (FL): The Strawberry Festival day moved from Mar 1 to Mar 8, 2027 (revision of Mar 24, 2026); the older approved PDF is still online.
- Palm Beach County (FL): Feb 15, 2027 (Presidents’ Day) is now a teacher workday with no school; the original calendar had that workday on Feb 24.
- Houston ISD (TX): The May 14, 2026 board revision changed Nov 6, Mar 26 and Mar 29; copies of the February version are still around.
- Montgomery County (MD): The last day is June 11, 2027 after the April 30, 2026 amendment; a leftover footnote still says June 16.
- Atlanta, Cobb, Clayton, Fulton, Henry and Paulding (GA): These districts call a week in February “Winter Break”. The December break has another name (December Break, Winter Holidays, Semester Break).
Found a wrong date?
Every page has a “Report a wrong date” form, and you can also report it here. Reports are checked against the district’s document, and the page is updated when the district confirms the change.