Date & Time Tools

Calculate exact age in years, months, days, and hours.

Add or subtract days, weeks, or months from a date.

Calculate working days between two dates.

Format any date in 12 different patterns.

Convert Unix epoch seconds or milliseconds to readable dates and back.

Convert times between world time zones.

Find the ISO and regular week number for any date.

Count down to any future date and time.

Enter your last menstrual period or conception date to get your estimated due date, current week, trimester, and pregnancy milestones.

See the current time in New York, London, Tokyo, Sydney, Dubai and 15+ cities simultaneously. Add or remove cities freely.

Enter your last period date and cycle length to find your ovulation day, fertile window, next period, and a full calendar view.

Calculate the exact duration between two times or two dates. Get results in hours, minutes, seconds, and decimal formats.

Find out how old you'd be on every planet. Each planet orbits the Sun at a different speed, so your age varies across the solar system.

Find the best time to meet across multiple time zones. See what time it is for each participant and spot the ideal overlap window where everyone is available.

Find the moon phase for any date. See the phase name, illumination percentage, and days until the next full or new moon in the 29.5-day lunar cycle.

Calculate total hours worked across multiple time entries. Supports overnight shifts, optional hourly rate for earnings calculation, and weekly totals.

Solve for speed, distance, or time — enter any two values and instantly calculate the third. Supports km/h, mph, m/s, knots, km, miles, hours, minutes, and seconds.

Calculate the exact age difference between two people or any two dates. See the gap in years, months, and days, plus both current ages.

Get exact sunrise, sunset, solar noon, and day length for any location and date. Enter coordinates or use your GPS location.

See your physical, emotional, and intellectual cycle charts based on your birth date. Find your peak days, low days, and critical transition days.

Enter your birthday to instantly find your Western zodiac sign and Chinese zodiac animal. See your element, traits, ruling planet, and compatible signs.

ECalculate the exact distance from the Earth to the Sun in kilometers, miles, and Astronomical Units (AU) for any past, present, or future date.