Date Calculator
Add or Subtract Time from Any Date
Start Date
Operation
Time Period
How to Use
Select Start Date
Choose your starting date from the calendar picker, or click "Use Today" to start from today's date.
Choose Operation
Select "Add" to find a future date or "Subtract" to find a past date. Then enter the time period (years, months, weeks, days).
Get Result
Click Calculate to see the result date with the day of the week and complete calculation details.
Examples
Project Deadline
Add: 90 days
Use: Planning project completion
Historical Date
Subtract: 6 months
Use: Finding past dates
Future Event
Add: 2 years, 3 months
Use: Long-term planning
Frequently Asked Questions
Does it account for leap years?
Yes, the calculator correctly handles leap years in all calculations. February 29th will be included in leap years automatically.
Can I add both months and days at the same time?
Yes! You can combine different time units (years, months, weeks, days) for complex calculations. The calculator will apply them all to get the final result.
What happens when I add months to dates like January 31?
The calculator intelligently handles month-end dates. For example, January 31 + 1 month = February 28 (or 29 in leap years), as February doesn't have 31 days.
Can I calculate business days only?
The standard date calculator uses calendar days. For business days (excluding weekends and holidays), use our Work Hours Calculator.
Features
Add or Subtract
Calculate both future and past dates with ease. Perfect for deadlines, planning, and historical research.
Multiple Time Units
Combine years, months, weeks, and days in a single calculation for flexible date arithmetic.
Accurate Results
Handles leap years, varying month lengths, and provides day of the week for the result.