Date & Time Tools

34 Free Online Tools

Precise age calculators, date differences, day counters, stopwatches, countdowns, and world time converters. Every tool is free, works offline in your browser, and requires no registration or software installation.

All Date & Time Tools (34)

Age Calculator

Calculate your exact age in years, months, weeks, days, hours, and minutes from your date of birth, with countdown to your next birthday.

Date Difference Calculator

Calculate the exact number of days, weeks, months, and years between any two calendar dates.

Days Between Dates

Quickly count the exact total number of days between two dates with optional inclusive day count.

Add Days to Date

Add a number of calendar days or business days to any starting date to determine the exact future target date.

Subtract Days from Date

Subtract days, weeks, or months from any date to find the historical past date and day of the week.

Time Duration Calculator

Calculate elapsed duration between two clock times (hours, minutes, seconds) with overnight 24-hour wrap-around support.

Countdown Timer

Create real-time countdown timers for custom events, holidays, product launches, and birthdays with full-screen mode and audio alert.

Stopwatch

High-precision online stopwatch with millisecond accuracy, lap time split tracking, and CSV lap export.

World Time Converter

Compare current times across global timezones (UTC, EST, PST, GMT, CET, IST, JST, AEST) with interactive time slider for meeting scheduling.

Week Number Calculator

Find the current ISO 8601 week number of the year, total weeks in any given year, and the start and end dates of each calendar week.

Days Until New Year Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until New Year.

Days Until Martin Luther King Jr Day Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Martin Luther King Jr Day.

Days Until Valentine's Day Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Valentine's Day.

Days Until Presidents' Day Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Presidents' Day.

Days Until St. Patrick's Day Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until St. Patrick's Day.

Days Until Easter Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Easter.

Days Until Earth Day Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Earth Day.

Days Until Cinco de Mayo Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Cinco de Mayo.

Days Until Mother's Day Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Mother's Day.

Days Until Memorial Day Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Memorial Day.

Days Until Father's Day Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Father's Day.

Days Until Summer Solstice Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Summer Solstice.

Days Until Independence Day (4th of July) Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Independence Day (4th of July).

Days Until Labor Day Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Labor Day.

Days Until Autumn Equinox Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Autumn Equinox.

Days Until Halloween Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Halloween.

Days Until Veterans Day Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Veterans Day.

Days Until Thanksgiving Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Thanksgiving.

Days Until Black Friday Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Black Friday.

Days Until Cyber Monday Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Cyber Monday.

Days Until Winter Solstice Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Winter Solstice.

Days Until Christmas Eve Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Christmas Eve.

Days Until Christmas Day Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until Christmas Day.

Days Until New Year's Eve Countdown

Live ticking countdown clock showing exact days, hours, minutes, and seconds until New Year's Eve.