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
Thursday, 23 July 2026
- ISO format
- 2026-07-23
- Day of week
- Thursday
- Day of year
- 204
- 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.