Date Calculator
Calculate date differences and perform date arithmetic
Choose Calculator Mode
Calculate Date Difference
Find the difference between two dates
Frequently Asked Questions
How do I calculate the number of days between two dates?
Select 'Date Difference' mode, enter your start date and end date, then click Calculate. The tool will show you the exact number of days, weeks, months, years, and business days between the two dates.
What are business days and how are they calculated?
Business days are weekdays (Monday through Friday), excluding weekends. Our calculator counts only these days when showing business days, which is useful for work deadlines and project planning. Note that public holidays are not excluded in this calculation.
How do I find a date 30 days from now?
Use the 'Add Days' mode. Click 'Today' to set today's date as your starting point, enter 30 in the days field, and click Calculate. The tool will show you the exact date 30 days from today.
Can I calculate dates in the past?
Yes! Use the 'Subtract Days' mode to find dates in the past. Enter your starting date, the number of days to subtract, and click Calculate. This is useful for determining when something started.
How accurate is the date calculator?
Our date calculator is 100% accurate and accounts for leap years, varying month lengths, and all calendar rules. It uses the date-fns library for precise date calculations.