How Many Days Until Constitution Day?
Time Remaining Until Constitution Day
What is the Constitution Day date in numbers?
| MM-DD-YYYY | — |
|---|---|
| DD-MM-YYYY | — |
| YYYY-MM-DD | — |
| MM/DD/YYYY | — |
| DD/MM/YYYY | — |
For schools, agencies, and citizenship programs, YYYY-MM-DD (ISO 8601) keeps Constitution Day dates clear.
“How many days until Constitution Day?” — quick FAQ
Which Constitution Day does this page track?
This page tracks the next U.S. Constitution Day (also known as Constitution Day and Citizenship Day), observed on September 17. If today is before that date, the countdown targets this year; once your local time passes midnight at the start of September 17, it automatically moves to the following year.
Is Constitution Day a fixed date?
Yes. It is a fixed-date observance on September 17, marking the signing of the U.S. Constitution in 1787, which makes planning school lessons and events straightforward.
Why does the headline show calendar days?
The main number uses calendar days, counting midnight-to-midnight and including today. That keeps the result stable and easy to share, while a live breakdown underneath covers precise time.
What can I use this countdown for?
It’s designed for schools, colleges, libraries, civics programs, naturalization ceremonies, and public-awareness campaigns that need an accurate timeline.
Does it respect my time zone?
Yes. All calculations run locally in your browser using your device’s time zone—no time-zone or location data is sent to our servers.
How can I quickly copy the date?
Use the buttons under the main result: one copies the full written date, the other copies the
ISO 8601 format (YYYY-MM-DD) for documents, schedules, and integrations.
How this page calculates the Constitution Day countdown
This page gives a clear, reusable answer to a recurring civics question: how many days remain until the next Constitution Day? Because the observance always falls on September 17, the underlying logic is simple, stable, and safe to rely on for academic calendars and official programming.
When the page loads, a lightweight script reads your current local date and time from your device. It sets a target at September 17 of the current year and anchors that to your local midnight at the start of Constitution Day. If your clock is still before that point, the countdown points to this year; if the date has begun or passed, it automatically advances to September 17 of the following year so the timer always looks ahead.
The bold headline uses a calendar-day method, counting how many midnight boundaries lie between “today” and Constitution Day, with today included in the total. This mirrors how people mark off wall calendars and prevents the main count from jumping as hours pass.
Beneath it, a live breakdown converts the remaining time into hours, minutes, and seconds until your local midnight at the start of Constitution Day. That dual presentation keeps the top-line answer quick to scan while giving coordinators precise timing for classroom plans, citizenship ceremonies, and content releases.
To support unambiguous communication, the tool also prints the target date in multiple numeric formats
and shows its day-of-year index plus
ISO week number. Using ISO 8601
(YYYY-MM-DD) helps avoid confusion between regional date styles in shared documents,
compliance materials, and scheduling tools.
All countdown logic runs entirely in your browser—no external APIs and no export of your time-zone data. The inline calendar opens to September with Constitution Day highlighted so you can instantly see where it falls in the year alongside the live countdown.