Date & Time
Date & Time Tools
5 free tools for working with dates, times, and timezones.
Age Calculator by Birthday
Calculate your exact age in years, months, and days from your birthday
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Days Between Dates Calculator
Find the exact number of days between any two dates
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Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates
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Day of the Week Calculator
Find what day of the week any date falls on
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World Timezone Converter
Convert times across different world timezones instantly
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Business Days Calculator
Count business days between dates, excluding weekends and holidays
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Date Format Converter
Convert dates between ISO, Unix, MM/DD/YYYY, and all formats
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Countdown Timer
Live countdown to any target date and time
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Time Duration Calculator
Add or subtract two time durations in hours, minutes, seconds
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ISO Week Number Calculator
Find ISO week number, day of year, quarter, and leap year info
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Stopwatch & Timer
Online stopwatch with lap times and a countdown timer — no install needed
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Pomodoro Timer
Focus timer using the Pomodoro Technique. 25-min sessions with short and long breaks
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Timezone Meeting Planner
Find the best meeting time across multiple time zones with overlap visualization
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Date Add/Subtract
Add or subtract days, weeks, months, years from any date.
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Meeting Time Planner
Plan meetings across multiple time zones with city-by-city local times.
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