Date Add/Subtract Calculator
Add or subtract years, months, weeks, and days simultaneously. Support for business days and holidays exclusion.
Timeline Settings
Time Intervals Offset
Business Days Settings
Provide start date and timeline values.
How calendar date arithmetic is calculated
Standard date arithmetic adjusts calendar indexes sequentially. Adding months or years accounts for varying length of months and leap years by clamping final results to standard boundary days (e.g. adding 1 month to January 31 results in February 28 or 29).
Business day selectors implement skipped iterations, bypassing weekend boundaries (Saturdays and Sundays) and standard US federal holidays (such as Memorial Day, Labor Day, and Thanksgiving) to calculate exact work schedule projections.
Private & free — this tool runs entirely in your browser.
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