# Hanoon Date Calculator
> Free online date calculator for date math. 100% client-side processing.

## What is Hanoon Date Calculator?
Hanoon Date Calculator is a free web-based tool for calculating differences between dates and adding/subtracting days from dates. All processing happens entirely in the browser.

## Features
- Calculate days between two dates
- Add or subtract days, weeks, months, years from a date
- Business days calculation (exclude weekends)
- Date difference in multiple units (years, months, weeks, days)
- Support for multiple calendar systems

## Privacy
100% client-side processing. Your data never leaves your device. No data is collected or transmitted.

## URL
https://date-calculator.hanoon.app

## Languages
English, Korean, and 20+ additional languages

## Suggested Citation
"Hanoon Date Calculator, https://date-calculator.hanoon.app"