Time & Date
Work out ages, durations, deadlines and time zones — or just start a reliable timer.
20 free time & date tools. Every tool runs in your browser, works without an account, and processes files locally whenever the browser allows it.
By the utils.sbs team · Reviewed November 2026
The shelf
All time & date tools
20 tools · updated for 2026
- Age CalculatorpopularCalculate exact age in years, months and days.
- Date DifferenceCount days, weeks and months between two dates.
- Add Days to DateAdd or subtract days from any date.
- Subtract DaysMove a date backwards by a chosen number of days.
- Countdown CalculatorSee time remaining until a future date.
- Workdays CalculatorCount business days between two dates.
- Epoch ConverterConvert Unix timestamps to dates and back.
- Timezone ConverterConvert a time between world time zones.
- Week Number CalculatorFind the ISO week number for any date.
- Day of Year CalculatorFind the ordinal day for a date.
- Leap Year CheckerTest whether a year is a leap year.
- Date FormatterFormat a date in ISO, locale and custom styles.
- Duration CalculatorAdd or subtract hours, minutes and seconds.
- Time Card CalculatorCalculate hours worked from start and end times.
- Pomodoro TimerA focused 25/5 work-and-break timer.
- StopwatchPrecise start, stop and lap timing.
- Countdown TimerSet a countdown with an audible finish.
- World ClockSee the current time in major world cities.
- Time Zone Meeting PlannerFind a reasonable overlapping meeting time.
- Days Until CalculatorCount down to holidays, launches or trips.
How this shelf works
About time & date tools
Time & Date tools handle the small, repeatable jobs that show up between real work: dates, clocks, timers. They are built as focused utilities, so each page does one job without asking you to create an account or install software.
Open a tool, add your input, adjust the settings, and download the result. Processing happens in the browser using the platform APIs available for that file type. Files are not uploaded to a server, so the tool keeps working offline once the page has loaded.
Looking for something else? Browse the full tool index or search the catalogue from the homepage.
Time & Date tool questions
Are time & date tools free?
Yes. Every time & date tool on utils.sbs is free, requires no account, and has no per-file or per-use charge.
Are my files uploaded when I use a time & date tool?
No. The tools are designed to process input in the browser whenever the platform API allows it. Files are not uploaded to a server for processing.
Do I need to install anything to use these tools?
No. Everything runs in a modern web browser. Open a tool page, use the workspace, and download the result.
How do I choose the right time & date tool?
Each tool page describes what it does, its input and output formats, the engine it uses, and its limitations. Start with the description that matches your job, then open the tool page for the workspace and step-by-step guide.