Days Between Dates
Find out exactly how many days, weeks, and working days fall between any two dates — instantly.
Whether you're counting down to a deadline, checking a contract term, tracking a pregnancy, or simply curious how long you've been waiting — this calculator gives you the exact number of days between any two dates in seconds. No maths, no guesswork. Just enter a start date and an end date and get your answer.
How Many Days Between Two Dates?
The calculation is simpler than it sounds, but the complication most people hit is leap years. Every four years, February gains an extra day — which means a date range spanning late February can return a different result depending on the year. Our calculator accounts for this automatically.
The other common confusion is whether to count the start date, the end date, both, or neither. The standard mathematical answer is to count neither ("exclusive"), which is what most date calculators use by default. If you need to include the final day — for example in a legal notice period — use the "include end date" toggle. This adds exactly one day to the result.
Q: How many days between two dates?
A: Subtract the start date from the end date. The result is the number of calendar days between them, not counting the start day or the end day. Use our calculator above to get the exact figure instantly, including automatic handling of leap years.
Q: Does the calculator include the start and end dates?
A: By default, the calculator excludes both the start and end dates (standard mathematical convention). Toggle "include end date" to add one extra day — useful for legal notice periods, countdowns, or any situation where the final day counts as a full day.
Q: How do I calculate days between dates manually?
A: Convert both dates to a day-number from the start of the year (day 1 = January 1), then subtract. Remember to account for leap years if your range spans February 29. For ranges crossing year boundaries, add 365 (or 366 for leap years) for each full year in between.
Working Days vs Calendar Days — What's the Difference?
Calendar days count every day including weekends. Working days (also called business days) count only Monday to Friday, excluding weekends. For example, 14 calendar days from a Monday is two full weeks, but only 10 working days.
The distinction between calendar days and working days matters enormously in professional and legal contexts. Bank transfers, delivery estimates, legal notice periods, and employment contracts almost always state timelines in working days — which excludes weekends.
| Period | Calendar Days | Working Days |
|---|---|---|
| 2 weeks (Mon–Mon) | 14 | 10 |
| 1 month (approx.) | 30 | ~22 |
| 1 quarter (90 days) | 90 | ~65 |
Q: How many working days between two dates?
A: Working days between two dates = calendar days minus weekends. Use our calculator for an instant count. Roughly, divide calendar days by 7 and multiply by 5 as a quick estimate, but our tool gives the precise figure.
Q: What counts as a business day?
A: In most countries, a business day is Monday through Friday, excluding Saturday and Sunday. The definition can vary: some industries operate on weekends, and international contracts may specify different working-week structures.
Q: How many working days in a month?
A: A typical month has 20 to 23 working days, depending on how many weekends fall within it. Use our calculator to find the precise number for any specific month.
Common Uses for a Days Between Dates Calculator
A days between dates calculator is most commonly used for project deadlines, contract notice periods, pregnancy due date tracking, legal filing windows, visa expiry monitoring, and counting down to personal milestones like weddings or birthdays.
Project Deadlines & Work Planning
When a client says "we need this in 30 business days", you need the calendar date that equates to. Enter today as the start date and the calculator tells you exactly which date you're working toward.
Legal Notice Periods & Contracts
Legal documents almost always specify time in days. Employment notice periods are typically calendar days. Court filing deadlines are often working days. When precision matters, toggle between modes and read your document carefully.
Pregnancy & Due Date Tracking
A standard pregnancy is 280 calendar days (40 weeks) from the first day of the last menstrual period. Count backwards from your due date to confirm your timeline, or count forward to find out exactly how many days remain.
Travel & Visa Expiry
Most tourist visas specify a maximum stay in days — 90 days in 180 for the Schengen Area, for instance. Enter your entry date and planned exit date to check whether you're within your allowed stay.
Milestones & Anniversaries
Counting the days between your wedding date and today, tracking how many days until a significant birthday, or finding out how long you've been at a job — all simple lookups with the same calculator.
Q: How many days between now and my deadline?
A: Enter today as the start date and your deadline as the end date. The calculator returns the total number of days remaining. Toggle to working days if your deadline is measured in business days.
Q: How do you count days in a legal notice period?
A: Most legal notice periods count calendar days starting the day after the notice is given. The end date is typically included. Use the "include end date" toggle in our calculator to match this convention.
Q: How many days is a 3-month notice period?
A: Three calendar months is typically 90 to 92 days depending on which months are involved. Enter exact dates for a precise count.
Days Between Famous Dates — Quick Reference
Some well-known date gaps: Halloween (31 Oct) to Christmas (25 Dec) is 55 days. Christmas (25 Dec) to New Year's Day (1 Jan) is 7 days. Valentine's Day (14 Feb) to Christmas (25 Dec) is 314 days (315 in leap years).
| Date Pair | Days Between |
|---|---|
| 1 January → 31 March (end of Q1) | 89 days (90 in leap year) |
| 1 January → 30 June (end of H1) | 180 days (181 in leap year) |
| Halloween (31 Oct) → Christmas (25 Dec) | 55 days |
| Christmas (25 Dec) → New Year's Day (1 Jan) | 7 days |
| Valentine's Day (14 Feb) → Christmas (25 Dec) | 314 days (315 in leap year) |
| 1 January → 31 December | 364 days |
Q: How many days between Halloween and Christmas?
A: From 31 October to 25 December is 55 days. This is the same every year as both are fixed calendar dates.
Q: How many days from Christmas to New Year?
A: From 25 December to 1 January is 7 days, consistent every year.
Q: How many days between January 1 and December 31?
A: From 1 January to 31 December, counted exclusively, is 364 days in a standard year. Including 31 December gives 365 days — the full year.
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