Days Until Date Calculator
Enter a target date to see exactly how many days remain — or have already passed.
Your calculation is performed in your browser.How it works
The calculator compares your target date with today's date. If the target is in the future, it counts the days remaining; if it has already passed, it counts the days elapsed since.
Formula & methodology
The calculator counts whole calendar days between today and your target date. A negative result means the date has already passed, and the tool then reports how many days ago it was.
Days remaining
Days remaining = Target date − TodayWeeks and days
Weeks = ⌊ Days remaining ÷ 7 ⌋ · Extra days = Days remaining mod 7What each term means
- Target date
- The future date you are counting down to.
- Today
- Your device date, at midnight.
Worked example
If today is September 13, 2026 and your target date is October 28, 2026, there are 45 days remaining.
Common uses
- —Counting down to a wedding, exam, launch date, or other upcoming event.
- —Finding out how many days have passed since a milestone, injury, or last event.
- —Tracking deadlines by seeing exactly how many days remain to act.
Important notes
- —Today's date is always used automatically — you never need to enter it yourself.
- —Results are shown in plain language ("45 days remaining", "12 days ago") rather than raw negative numbers.