Date Calculator
Calculate Date Differences & Add/Subtract Time Periods
Professional date calculator for computing the difference between dates, adding or subtracting days, weeks, months, or years. Perfect for project planning, deadline tracking, and event scheduling.
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Date Calculator
Perform various date calculations and find date information
Add or subtract time from a date to find a future or past date
Quick Examples
Result
Date calculation result and information
Enter valid inputs to see the date calculation result
Understanding Date Calculations
Learn how date arithmetic works and master time-based planning.
Date Difference
Calculate the exact number of days, weeks, months, or years between two dates. Useful for age calculation, project duration, and more.
Add/Subtract Days
Add or subtract any number of days from a date to find future or past dates. Perfect for deadline planning.
Business Days
Calculate working days excluding weekends and holidays. Essential for business and project management.
Leap Years
Our calculator automatically accounts for leap years (every 4 years, except centuries not divisible by 400).
Time Zones
Date calculations can vary by time zone. Always specify the reference time zone for international projects.
Calendar Systems
The Gregorian calendar (most common) differs from Julian, Hebrew, Islamic, and Chinese calendars.
Common Date Calculation Uses
Project Management
- Project duration estimation
- Milestone deadline calculation
- Sprint planning intervals
- Resource allocation periods
- Contract expiration dates
Personal Planning
- Vacation countdown
- Anniversary tracking
- Pregnancy due dates
- Event scheduling
- Goal deadline setting
Business & Legal
- Payment due dates
- Warranty expiration
- Statute of limitations
- Filing deadlines
- Renewal reminders
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