Date Calculator
Comprehensive date calculator to add or subtract days, weeks, months, and years from any calendar date with leap year accuracy.
Calculation Formula & Mathematical Model
The mathematical formula governing date calculator calculations standardizes chronological intervals and handles non-linear calendar boundary variations:
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Frequently Asked Questions
How are end-of-month dates handled when adding months?▼
Standard calendar pinning applies: adding 1 month to January 31 lands on February 28 (or Feb 29 in leap years).