Time & Date
Timezone converters, countdowns, and date calculators
All Time & Date
Timezone Converter
Convert times between timezones and compare up to four zones side by side.
PopularDate Difference Calculator
Calculate the exact difference between two dates in years, months, days, and business days.
Age Calculator
Calculate your exact age in years, months, and days with birthday countdown and zodiac sign.
Countdown Timer
Live countdown to any target date or duration with presets, alerts, pause/resume, reminders, and persistence.
Stopwatch
Precise stopwatch with lap times, split tracking, and millisecond accuracy.
Business Days Calculator
Count business days between two dates or add working days to a date. Excludes weekends. Perfect for net-30 invoicing, SLAs, and project deadlines.
Pomodoro Timer
Pomodoro technique timer with customisable work and break durations, session tracking, and audio alerts.
Week Number Calculator
Find the ISO week number for any date. See day of year, quarter, and days remaining.
Time Duration Calculator
Calculate time duration between two times or add and subtract hours and minutes from a time. Handles overnight shifts and decimal hours.
World Clock
Live world clock showing the current time in major cities. Add any IANA timezone, remove what you don't need, updates every second.
About Time & Date
Work with timezones, countdowns, calendar math, and date formatting using our free browser-based time and date tools. Convert times between cities, calculate age and date differences, count business days, format timestamps for sharing, and plan meetings across multiple timezones. Every calculation runs locally in your browser, so your schedule data stays private.