Date Calculator
Count days, add or subtract time, count business days and convert time zones.
- Free. No sign-up.
- No limits per day.
- Your dates stay on your device.
- One page does one job.
Days between two dates
Find how many days, weeks, months and years are between two dates.
Your result shows here.
Add or subtract days
Add years, months, weeks and days to a date, or subtract them.
Your result shows here.
Business days
Count the business days between two dates, or move a date by business days.
Your result shows here.
Time zone converter
Change a date and time from one time zone to other time zones.
Your result shows here.
How to use Date Calculator
- Choose a section: days between dates, add or subtract, business days or time zones.
- Enter your dates. The result changes when you type.
- Select Copy to use the result.
Questions
Does the count include the end date?
Not by default. The count starts at the first date and stops before the end date. Monday to Wednesday is 2 days. Select Include the end date to count 3 days.
What happens at the end of a short month?
A day number that does not exist moves back to the last day of the month. January 31 plus 1 month is February 28, or February 29 in a leap year. February 29, 2024 plus 1 year is February 28, 2025.
What is a business day?
A business day is a day that is not a weekend day and not a holiday. The weekend is Saturday and Sunday unless you change it. By default the count does not include the start date and does include the end date.
Does the page know my holidays?
No. The page has no holiday lists. Add the holidays of your country, one date at a time. A holiday on a weekend day is not counted twice.
What happens when the clocks change?
Some clock times do not exist when the clocks move forward. The page uses the time after the change and tells you. Some times happen twice when the clocks move back. The page lets you choose the first or the second.
Where does the time zone data come from?
It comes from your browser. The browser has the IANA time zone database. An old browser can have old rules for some zones.
Are the hours and minutes exact?
They are calendar days times 24 and so on. They are not the clock time across a daylight saving change, where a day can have 23 or 25 hours.
Does my date go to a server?
No. Your device does the work. The page does not save or send your dates. Read more about privacy.