📅 Date Calculator
Add or subtract days from a date, or calculate days between dates.
About Date Calculator
Calculate the number of days, weeks, months, or years between two dates. Add or subtract time from any date. Useful for project planning, pregnancy due dates, contract durations, and more.
Features
- Days between dates
- Add/Subtract dates
- Business days option
Frequently Asked Questions
How to calculate days between dates?
Count all days from start date to end date. For business days, exclude weekends and optionally holidays. Day counting can be inclusive (both dates counted) or exclusive (end date excluded).
How to add days to a date?
Simply add the number of days to the calendar date. Our calculator handles month boundaries, leap years, and year wraps automatically. Adding 30 days to Jan 15 gives Feb 14.
What are business days and how are they calculated?
Business days are Monday through Friday, excluding public holidays. A project taking 10 business days starting Monday would end on Friday of the following week (2 weeks minus weekends).