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Days between dates calculator and countdown

Count the days, weeks and business days between two dates, add or subtract days, or start a live countdown to any event.

Days between71 daysWed, October 21, 2026 → Thu, December 31, 2026
Years, months, days2 mos 10 days
Weeks10 wk 1 d
Business days51
Weekend days20

In other units

Hours
1,704
Minutes
102,240
Seconds
6,134,400
Months (approx.)
2.3
How we calculate

Days are counted as calendar days between the two dates, so daylight-saving changes never add or remove a day. The start date is day 0; switch on Include end date to count both ends.

business days = days − weekend days − holidays
Business days: whole weeks × working days per week, plus the leftover days, minus holidays that fall on working days.

Years, months and days are found by adding whole months to the start date (month-end clamped) and counting the remaining days, the same way ages are counted.

Runs in your browser · no uploadHow it works

How to use Days between dates & countdown

  1. 1

    Pick a mode

    Choose Days between, Add / subtract, or Countdown at the top of the calculator.

  2. 2

    Enter your dates

    Type or pick the dates; tap Today to fill the current date, and decide whether the end date is included.

  3. 3

    Set working days if needed

    Select which weekdays count as the weekend and add holidays so business-day results match your calendar.

  4. 4

    Read and share the result

    See the totals or the resulting date with its weekday and ISO week, then copy the link to share the exact calculation.

Limits and Pro

Free with no caps: dates from year 1000 to 9999, up to 100 custom holidays, additions of up to 1,000 years or 100,000 business days, and countdowns to any time zone.

About Days between dates & countdown

Three date tools share this page. Days between counts the calendar days from one date to another and breaks the span down into years, months and days, whole weeks, business days, weekend days and the equivalent hours, minutes and seconds. A switch decides whether the end date counts as a day, which matters for things like hotel nights (it doesn't) versus a conference that runs Monday to Friday (it does).

Business days exclude Saturday and Sunday by default, but you can mark any set of weekdays as the weekend — Friday and Saturday across much of the Middle East, or just Sunday for a six-day week — and add your own public holidays or company closure days. Only holidays that land on working days are subtracted, so a holiday on a Saturday is never counted twice.

Add / subtract moves a date forward or back by years, months, weeks and days, or by a number of business days, and returns the resulting date with its weekday, ISO week number and day of the year. Use it for notice periods, payment terms such as net 30, visa stays, warranty end dates or project deadlines.

Countdown shows the days, hours, minutes and seconds until an event at a chosen time in any time zone, can fill the whole screen for a party or a classroom, and gives you a link that opens the same countdown for anyone. Calendar math never uses local clock time, so daylight-saving changes cannot shift a result by a day.

Privacy

All counting happens in your browser; the dates, holidays and event names you enter are not sent to any server. They are stored in the page address and this browser's local storage so a copied link or a later visit shows the same calculation.

Features

Business days your way

Any weekend pattern plus your own holidays, for counts and for adding working days.

Add or subtract time

Years, months, weeks and days with correct month-end handling, or working days only.

Live countdown

Time zone aware, full-screen ready and shareable as a link.

Days between dates & countdown: frequently asked questions

How many days are there between two dates?
Subtract the earlier date from the later one in calendar days. From January 1 to December 31, 2026 there are 364 days, or 365 if you count both the first and the last day — use the Include end date switch for that. The result is also shown as years, months and days, whole weeks plus days, and business days.
How do I calculate business days between two dates?
Count the weekdays and subtract public holidays that fall on them. The year 2026 has 261 weekdays from Monday to Friday; excluding Christmas Day, which is a Friday, leaves 260 working days. Add your own holidays to the list and choose which days form your weekend, and the calculator does the counting instantly, even across decades.
What date is 90 days from today?
Add the days to the calendar date. Starting on Tuesday, October 20, 2026, 90 days later is Monday, January 18, 2027. If you need working days instead — common for legal and shipping deadlines — switch to business days: 10 business days after October 20, 2026 is Tuesday, November 3, 2026, skipping two weekends.
What is January 31 plus one month?
February 28, or February 29 in a leap year. When the target month is shorter than the starting day, the date is clamped to that month's last day — the same rule spreadsheets use in EDATE and most banks use for monthly due dates. Likewise, adding one year to February 29, 2024 gives February 28, 2025.
Does daylight saving time change the result?
Not for date counts: days between dates are counted as calendar days, so a clock change never adds or loses a day. Countdowns do follow real time — from noon on March 7 to noon on March 9, 2026 in New York is 47 hours, not 48, because clocks spring forward on March 8 — and the countdown shows that correctly.

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