📅 Date & Time

Date & Time

39 calculators

Add Days to a Date Calculator Add any number of days, weeks, months or years to a date and get the resulting date.
Add Time Calculator Add or subtract two durations and get the result as HH:MM:SS plus decimal hours for payroll.
Baby Age Calculator Track a baby’s age in weeks, days, months and hours from their date of birth.
Birthday Calculator Find your next birthday, how many days away it is, and how old you will turn.
Birthday Countdown Calculator Count down the days, weeks and hours until a birthday.
Business Days Calculator Count working days between two dates, or add a number of business days to a date.
Calculate My Age Calculate your exact age in years, months, days and hours on any date.
Cat Years Calculator See your cat’s life stage timeline and how many years they have left.
Conception Date Calculator Work backwards from a due date to estimate the conception date and last menstrual period.
Countdown Calculator Count down the days, weeks and hours remaining until any future date.
Countdown Days Calculator Count the working days, weekends and total days between two dates.
Countdown to Date Calculator Count the days, weeks and hours from today to any future date.
Date Difference Calculator Calculate the number of days, weeks, months and years between two dates.
Day of the Week Calculator Find out which day of the week any date falls on.
Days Until Christmas Calculator See how many days are left until Christmas, with the weekday it falls on this year.
Days Until New Year Calculator Count down the days remaining until 1 January.
Dog Years Calculator See your dog’s life stage timeline and remaining life expectancy by breed size.
Due Date Calculator Calculate a pregnancy due date from the last period and cycle length.
Epoch Converter Convert between Unix timestamps and human-readable dates in UTC and local time.
Time Format Converter Convert a clock time between 12-hour and 24-hour notation in both directions at once.
Hours Calculator Calculate hours worked between two times, with an unpaid break deducted.
Leap Year Calculator Check whether a year is a leap year and see how many days it contains.
Leap Year Checker Check whether a year is a leap year and see the rule applied to it.
Military Time Converter Convert between 24-hour military time and standard 12-hour AM/PM time.
Minutes to Hours Converter Convert minutes into hours and minutes, with seconds and decimal hours.
Moon Phase Calculator Calculate the moon phase and illumination for any date.
Retirement Countdown Calculator Count down the days, weeks and working days until you reach retirement age.
Subtract Days from a Date Calculator Subtract any number of days from a date to find the earlier date.
Sunrise and Sunset Calculator Estimate sunrise, sunset and daylight hours for any date, latitude and longitude.
Time Between Dates Calculator Calculate the exact duration between two dates in years, months, days and smaller units.
Time Card Calculator Add up a week of working hours and calculate regular pay, overtime and gross wages.
Time Duration Calculator Calculate the duration between two times in hours, minutes and seconds.
Time Zone Converter Convert a wall-clock time from one UTC offset to another, with the day shift shown explicitly.
Timesheet Calculator Add up hours worked from clock-in and clock-out times and get gross pay, including overtime over 40 hours.
Date to Unix Timestamp Converter Convert a calendar date into a Unix timestamp in seconds, milliseconds and other units.
Week Number Calculator Find the ISO week number and week of the year for any date.
Weeks Calculator Convert between weeks, days, hours, minutes and seconds.
Work Days Calculator Count the working days between two dates, excluding weekends and holidays.
Zodiac Sign Calculator Find your western zodiac sign from your date of birth, with the exact date range.