Date, Time & Timezone Tools for Global Teams
Need the exact number of days between two dates? Struggling with Unix timestamps? Calculate age, convert time zones, count business days, and run precision stopwatches — all instantly in your browser.
Working across global time zones can be a nightmare. Our tools simplify converting ISO formats, Unix timestamps, and time difference calculations, ensuring your logs and events are always coordinated.
Age Calculator
Calculate your exact age in years, months, weeks, days, hours, and minutes.
Astronomic Clock
Visualize solar, lunar, and celestial time with stunning precision.
Business Days Calculator
Calculate the number of working days between two dates, excluding weekends.
Countdown Timer
Multiple simultaneous countdown timers with visual progress indicators.
Add or Subtract Days from Date
Easily add or subtract days, weeks, months, or years from any given date.
Date Difference Calculator
Calculate the exact duration between two dates.
Leap Year Checker
Quickly check if a year is a leap year and see when the next one will be.
Seconds to H:M:S Converter
Convert seconds to hours, minutes, seconds and vice versa.
Stopwatch & Lap Timer
A simple and precise stopwatch with lap timing.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa.
Week Number Calculator
Find the ISO 8601 and US week number for any date.
Select the date or time tool
We cover Unix timestamp conversion, ISO 8601 formatting, timezone comparisons, and date difference calculations. Each tool is self-contained; pick the one that matches your use case.
Enter your date or timestamp
Type or paste the value. Unix timestamps can be in seconds or milliseconds; the tool detects which automatically. For human-readable dates use any common format and the parser will figure it out.
Review the converted output
Results show both the formatted date and the raw numeric value so you can cross-check. Timezone offsets are displayed explicitly to avoid the ambiguity that causes so many production bugs.
Copy and use in your code
Grab the result with one click. If you are debugging a log file, paste timestamps in batch; some tools accept multiple lines and convert them all at once.
Backend Developers Working with Logs
Log files mix Unix timestamps, ISO strings, and sometimes ambiguous local times. Converting them all to a single format for comparison is tedious without a tool. Ours handles batch conversion so you can paste a column of timestamps and get them all normalized at once.
Global Teams Scheduling Meetings
Finding a time that works for London, New York, and Tokyo is a recurring headache. Our timezone comparison tool shows all three clocks side by side; you pick a slot that avoids antisocial hours for everyone, copy the times, and send the invite.
Event Planners Managing Deadlines
Counting business days between two dates, calculating how many weeks until a launch, or figuring out what day a date falls on next year: these are the tiny calculations that event planning is built on. Our date tools answer them faster than a calendar app.
| Tool | Best For |
|---|---|
| Age Calculator | Calculate your exact age in years, months, weeks, days, hours, and minutes. |
| Astronomic Clock | Visualize solar, lunar, and celestial time with stunning precision. |
| Business Days Calculator | Calculate the number of working days between two dates, excluding weekends. |
| Countdown Timer | Multiple simultaneous countdown timers with visual progress indicators. |
| Add or Subtract Days from Date | Easily add or subtract days, weeks, months, or years from any given date. |
| Date Difference Calculator | Calculate the exact duration between two dates. |
| Leap Year Checker | Quickly check if a year is a leap year and see when the next one will be. |
| Seconds to H:M:S Converter | Convert seconds to hours, minutes, seconds and vice versa. |
| Stopwatch & Lap Timer | A simple and precise stopwatch with lap timing. |
| Unix Timestamp Converter | Convert Unix timestamps to human-readable dates and vice versa. |
| Week Number Calculator | Find the ISO 8601 and US week number for any date. |
Yes; completely free with no limits.
All date calculations happen in your browser. No timestamps or dates are sent to any server.
Unix timestamps are timezone-agnostic by definition; they represent seconds since January 1, 1970 UTC. The converter shows the timestamp in both UTC and your local timezone so you can see the difference clearly.
Some tools support multi-line input for batch conversion. Paste a list of timestamps, one per line, and get all results at once. Check the specific tool for this feature.
Yes. The tool uses the Intl API built into modern browsers, which includes the full IANA timezone database with DST rules. It correctly handles transitions and historical timezone changes.
ISO 8601, RFC 2822, common US and European formats, and Unix timestamps in both seconds and milliseconds. The parser is lenient and will try to interpret ambiguous inputs, but using ISO 8601 is always the safest bet.
Yes. The date difference calculator includes an option to count only business days, excluding weekends. National holidays are not included because they vary by country; subtract those manually if needed.
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