Date & Time

Add or subtract days, weeks, months, years, hours, or minutes from any date and see the resulting date instantly.

Calculate your exact age in years, months, and days. See total days, weeks, hours, next birthday countdown, zodiac sign, and day of week you were born.

Find out exactly how many days until your next birthday, what age you will be, and what day of the week your birthday falls on. Free, instant, no sign-up required.

Find your Chinese zodiac animal sign, element, and Yin/Yang energy from your birth year. Includes personality traits, lucky colors, lucky numbers, and compatible signs.

Count down to any future event: a New Year, vacation, product launch, or deadline. Live days, hours, minutes, and seconds. Save multiple countdowns and share via link. Runs in your browser.

Find out what day of the week any date falls on. Shows the day name, week number, day of year, quarter, and more. Also find the next occurrence of any weekday.

Calculate the exact number of days, weeks, months, and years between two dates. Toggle weekdays-only and include/exclude the end date.

Track how many days, weeks, months, and years have passed since any date. Perfect for sobriety, quit dates, and personal milestones.

Calculate the date of Easter Sunday for any year using the Anonymous Gregorian (Butcher's) algorithm. Supports Gregorian and Julian calendar traditions.

Calculate the precise dates and times of the March equinox, June solstice, September equinox, and December solstice for any year from 1000 to 3000, using Jean Meeus astronomical algorithms.

Find the fiscal quarter, fiscal year, and days remaining for any date. Supports custom fiscal year start months (e.g. April for UK, October for US federal).

Enter your birth year to find out which generation you belong to - Gen Z, Millennial, Gen X, Baby Boomer, Silent Generation, or Gen Alpha - along with defining events and characteristics.

Calculate sunrise, sunset, golden hour, and blue hour times for any location and date. Perfect for photographers wanting to plan the perfect shot at the best natural light.

Calculate the great-circle distance between two points on Earth using the Haversine formula. Returns distance in km and miles, initial bearing, and the geographic midpoint.

Convert dates between the Hebrew (Jewish) calendar and the Gregorian calendar. Supports leap years with Adar I & II and all 12/13 Hebrew months.

Convert dates between the Hijri (Islamic) calendar and the Gregorian calendar. Uses the tabular Islamic calendar algorithm. Works entirely offline in your browser.

Count the days until every major holiday. See upcoming holidays sorted by how soon they arrive, all calculated locally in your browser.

Create and download ICS (iCalendar) files for any event. Compatible with Google Calendar, Outlook, Apple Calendar, and any RFC 5545 calendar app.

Find the ISO 8601 week number for any date. See the week year, day of the week, and the exact Monday-Sunday date range for the selected week.

Convert between Gregorian calendar dates and Julian Day Numbers (JDN / JD). Also shows the equivalent Julian calendar date and Modified Julian Date (MJD).

Check if any year is a leap year, see the number of days in each month, find the next and previous leap years, and explore why 1900 was not a leap year.

Visualize your life as a grid of weeks. Enter your birth date and life expectancy to see which weeks have passed and how many remain - inspired by the famous "Your Life in Weeks" concept.

Find the moon phase for any date. Shows the current lunar phase, illumination percentage, moon age, and the dates of the next new moon and full moon.

Plan meetings across multiple cities and timezones. Visual overlap grid shows working hours for every participant. Download .ics or share a link.

A fully configurable Pomodoro timer with 25-minute work sessions, short breaks, and long breaks. Audio chime, browser notifications, and daily pomodoro count. Runs in your browser.

Check when Mercury, Venus, Mars, Jupiter, and Saturn are visible in the sky. Uses simplified orbital mechanics to predict planet elongation and visibility.

Free online stopwatch with millisecond precision, lap recording, best/worst lap highlighting, and CSV export. Start, stop, lap, and reset. Runs entirely in your browser.

Calculate sunrise, sunset, and solar noon for any latitude and longitude. Supports any UTC offset and detects polar day/night.

Predict tidal heights using a simplified harmonic model based on the major lunar and solar tidal constituents. View a 48-hour tide curve and find high/low tide times.

Calculate total work hours from clock-in and clock-out times. Add breaks, track overtime, and get a weekly summary. Supports overnight shifts.

Add, subtract, multiply, divide, or average a list of HH:MM:SS durations without calendar dates. Get results in HH:MM:SS, total seconds, minutes, and decimal hours.

Convert any date and time between multiple time zones instantly. Shows UTC offset, DST status, and day/night indicator. Uses the full IANA timezone database. Runs in your browser.

Convert Unix timestamps (epoch time) to human-readable dates and back. Auto-detects seconds vs milliseconds. Shows ISO 8601, RFC 2822, UTC, and local time. Live current timestamp for developers.

Enter your wedding date to find out how many years you have been married and discover the traditional and modern gift themes for each anniversary year.

Calculate how long you have worked at a job - in years, months, and days - and find out when your next work anniversary is.

Count the number of business days between two dates, excluding weekends and public holidays for the US, UK, or Canada.

See the current time in multiple cities and timezones simultaneously. Live-updating clocks with date, UTC offset, and DST indicator. Add your own zones, saved automatically to your browser.

Find your Western zodiac (astrological) sign from your birth date. See personality traits, element, modality, ruling planet, and strengths and weaknesses.