Date Calculator
Calculate days, weeks, and business days between two dates, or add/subtract days to find a target future or past date.
0 years, 1 months, and 15 days (45 total days)
Date Difference & Duration Algorithms
Calculates the exact time difference between two dates in total days, weeks, months, and business days (excluding weekends), or adds/subtracts days to compute a future or past date.
Calculation Steps
- 1Parse starting date and ending date into UTC timestamps to avoid daylight savings discrepancies.
- 2Calculate absolute difference in calendar days.
- 3Filter and count weekdays (Monday through Friday) to determine Business Days.
- 4For Add/Subtract mode: Add or subtract N days from starting date to determine the resultant date.
Practical Example
Scenario: Days between January 1, 2026 and August 15, 2026
Inputs: Start Date: 2026-01-01 | End Date: 2026-08-15
Calculation: Difference = 226 calendar days = 32 weeks and 2 days = 162 business days
Result: Total: 226 Days (162 Business Days)
Assumptions & Disclaimers
Key Assumptions:
- Business days exclude Saturdays and Sundays.
- National gazetted public holidays are not subtracted unless customized.
Legal notice deadlines or statutory limitation periods should be verified against specific court or administrative business day rules.
Frequently Asked Questions
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