This versatile tool helps you with various date-related calculations:

• Date Difference: Calculate the exact duration between two dates. You can see the result broken down into years, months, weeks, and days, as well as the total duration in days, weeks, months, or years. You can also choose whether to include the end date in the calculation (e.g., the difference from Jan 1 to Jan 2 is 1 day if the end date is not included, or 2 days if it is).
• Add/Subtract Duration: Start with an initial date and add or subtract a specific number of days, weeks, months, or years to find a future or past date. This is useful for project planning, event scheduling, or tracking milestones.

All calculations are performed using precise date logic to handle varying month lengths and leap years. Your inputs are processed locally in your browser.