Your files stay on your device

# Time and date tools

Compare time zones, add days to a date, count working days, time something with a stopwatch, and share when you are free.

11 tools

- [Timestamp converter

Turn a Unix timestamp into a readable date and back.
](/time/timestamp-converter)
- [Time zone converter

See one moment in every city you care about, side by side.
](/time/timezone-converter)
- [Duration converter

Convert between seconds, minutes, hours, days, and weeks.
](/time/duration-converter)
- [Availability sharer

Pick your free times and share them with a link. No calendar account needed.
](/time/availability)
- [Date calculator

Add days, weeks, or months to a date, or count the time between two dates.
](/time/date-math)
- [Calendar converter

Convert dates between the Gregorian, Hijri, Hebrew, Persian, Chinese, and other calendars.
](/time/calendar-converter)
- [ISO 8601 duration

Read and write ISO 8601 durations like P1DT2H.
](/time/iso-duration)
- [ISO week number

Find the week number of any date, or the dates in a week.
](/time/week-number)
- [Business day calculator

Count working days between two dates, with your own holidays left out.
](/time/business-days)
- [Stopwatch and countdown

A stopwatch with laps and a countdown timer that keeps time in a background tab.
](/time/stopwatch)
- [Epoch batch converter

Convert a whole list of Unix timestamps into readable dates at once.
](/time/epoch-batch)

Your files are processed on your device. The few tools that talk to the internet say so before they do.

---

Canonical HTML: https://nutter.tools/time/
Markdown version: https://nutter.tools/time/index.md
Plain-text version: https://nutter.tools/time/index.txt
Agent index: https://nutter.tools/llms.txt