Countdown calculator
Count down the days remaining until a target date — an event, deadline, holiday or anniversary.
Result
Days remaining
How to use this tool
- Enter the target date.
- Read how many days remain until it (today's date is read automatically from your device).
Assumptions
- Uses your device's current date — if your device's clock or timezone is wrong, the result will be too.
- A target date in the past shows a negative number of days.
Technical details: what the fields mean
- Target date
targetDate - The date you're counting down to.
Methodology
Days remaining = target calendar date − today's calendar date (read from your device), in whole days. Today is the reference date, not an extra day counted inclusively; the result is a date countdown, not a live hours-and-minutes timer.
Worked example
Countdown to a date 10 days from today
Inputs: Target date: <10 days from today>
Result: 10 days remaining
Practical guidance
- Bookmark or share this page's URL with your target date filled in (via the Share button) to check back on the countdown later.
Common mistakes
- Not accounting for timezones when the target date matters at a specific time of day, not just a calendar date.
FAQs
Is this a live countdown timer, and is today counted?
No. It compares whole calendar dates using your device's current date, so it does not show live hours or minutes. Today is the starting reference, not an additional inclusive day; a target date of today gives 0 days.
Last reviewed: 2026-10-11
Relies on your device's system clock and date being set correctly, and treats the target as a whole calendar date, not a specific time.
This tool provides an indicative estimate, based on the assumptions stated above.
Theme and tool preferences, along with saved and recently used lists, are stored only in this browser.