Date Calculator
Days between dates, add or subtract time. Runs in your browser.
How to use
To count days, pick a start and end date. You get the total days, weeks and business days, plus a years-months-days breakdown.
To find a date, pick a start date and add or subtract any amount of time.
FAQ
Is my data sent anywhere?
No. This tool runs entirely in your browser. Nothing you type, paste or upload is sent to a server or stored anywhere.
What happens when adding a month to January 31?
The result is the last day of February (28th or 29th), the usual convention when the target month is shorter.
Are holidays excluded from business days?
No — business days count Monday to Friday only, since holidays differ by country.