Date Calculator
Calculate date differences and add or subtract days, months, and years online. Free date calculator with weekday and holiday support.
Days Between Dates
Add/Subtract Days
Day Information
Age Calculator
About Date Calculator
Calculate the difference between dates, add or subtract days from a date, get day information, and calculate age. All calculations are done locally in your browser.
How to Use Date Calculator
Enter your values
Open Date Calculator and enter the values you want to calculate or convert.
Select units or options
Choose the input and output units, formats, or calculation parameters.
View results instantly
Results are calculated in real-time as you type — no submit button needed.
Copy or use the result
Copy the calculated result or use it directly in your work.
Frequently Asked Questions
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