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Dates · Useful tools.
3 Dates tools. Compare options and choose a generator, converter or calculator for your task.
Dates
Calculate intervals and find dates by adding or subtracting days. Check whether a tool uses calendar days and verify holiday rules before relying on a deadline.
Add days to a date
Add calendar days to a date and find the resulting date. The calculation includes weekends and public holidays.
Open toolSubtract days from a date
Subtract calendar days from a date to find an earlier date. Calculate calendar intervals including weekends.
Open toolDate difference
Calculate the difference in calendar days between two dates. Compare start and end dates with positive, zero or negative results.
Open toolA toolbox for people who build.
Explore people and document generators, validators, text converters, calculators and development utilities. Each page explains how to use its tool and interpret the result. Generators create synthetic test data; validators check mathematical rules rather than replacing official record lookups.