Time & Date
Work with timestamps, timers, and date calculations. — 8 tools available.
Time and date tools help you reason about time across programming, planning, and productivity tasks. Unix timestamp converters translate between epoch values and human-readable dates — essential when debugging API responses, log files, and database records. Date calculators find deadlines by adding business days, or compute exact ages from a birthdate. Productivity timers like the Pomodoro technique help structure focused work sessions. All time tools run entirely in your browser, using your local timezone by default.
8 Time & Date Tools
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back. Auto-detects seconds vs milliseconds.
Cron Expression Generator
Build cron schedule strings visually and get a plain-English explanation of when they run.
Age Calculator
Calculate your exact age in years, months, and days — plus total seconds lived for fun.
Work Day Calculator
Add working days to a start date (skipping weekends) to find a project deadline.
Life Progress Bar
Visualize how much of this year — and your life — has already passed with animated progress bars.
Pomodoro Timer
Browser-based 25/5 Pomodoro timer that shows the countdown in the browser tab title.
Date Difference Calculator
Calculate the exact difference between two dates in years, months, days, weeks, hours, and working days.
Hours Calculator
Calculate hours between two times, add or subtract hours from a time, and track weekly work hours with pay calculation.
Frequently Asked Questions
What timezone do the time tools use?
By default, time and date tools use your browser's local timezone, which is determined by your operating system settings. Timestamp converters display both UTC and your local timezone so you can compare. The tools use the JavaScript Intl API for timezone handling, which supports all IANA timezone identifiers.
What is the difference between Unix timestamps in seconds and milliseconds?
A Unix timestamp in seconds counts whole seconds since January 1, 1970 UTC (the Unix epoch). A millisecond timestamp multiplies that by 1,000 for sub-second precision. Most programming languages and databases use seconds (10 digits, e.g., 1700000000), while JavaScript's Date.now() returns milliseconds (13 digits, e.g., 1700000000000). Our timestamp tools detect and handle both formats automatically.
What is the Pomodoro Technique?
The Pomodoro Technique is a time management method developed by Francesco Cirillo in the late 1980s. You work in focused 25-minute intervals (pomodoros) separated by 5-minute breaks. After four pomodoros, you take a longer 15-30 minute break. The technique helps maintain concentration and prevent burnout by breaking work into manageable, timed intervals.