Time & Date Calculators
A toolkit for working with dates and times — durations, arithmetic, business days, Unix timestamps and ages.
Add to or subtract from a date
Result
Saturday, 25 July 2026
- ISO format
- 2026-07-25
- Day of week
- Saturday
- Day of year
- 206
- ISO week
- 2026-W30
- Applied
- + 0 days
All calculations run on the server using PHP’s date engine. Date-only calculators treat times as UTC to avoid daylight-saving ambiguity.