Free Date and Time Tools

• Ethiopian Calendar Converter

  See what year it is in Ethiopia today and convert any date between the Ethiopian and Gregorian calendars.

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• Graduation Year Calculator

  Find a child's high school class year from their birthday and the kindergarten cutoff, or a student's from their grade.

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• Friday the 13th Calculator

  See when the next Friday the 13th is, how many days away, and every Friday the 13th in any year.

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• Days Alive Calculator

  See how many days old you are, with your age in weeks, months, hours and seconds and your next milestone days.

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• Birth Year Calculator

  Find the year you were born from your age, or how old someone born in any year was in another.

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• Leap Year Calculator

  See whether any year, BC or AD, is a leap year and why, and when the next and previous leap years are.

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• Days From Today Calculator

  Find the date any number of days, weeks, months or business days from today or any other date, forward or back.

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• Age at Death Calculator

  Find how old someone was when they died, in years, months and days, and how old they would be today.

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• Day of the Year Calculator

  Find the day number and week number of any date, how much of the year is left, or the date for a day number.

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• Day of the Week Calculator

  Find the day of the week for any date, past or future, BC or AD, including Julian calendar dates.

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• Generation Calculator

  Find your generation from your birth year, with the full chart of generation names and years.

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• Roman Numeral Date Converter

  Write any date in Roman numerals, in any order, or read a Roman numeral date back.

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• Century Calculator

  See what century and millennium any year is in, BC or AD, or which years a century covers.

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• BC/AD Years Calculator

  Count the years between two years BC or AD, or how many years ago one was.

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• Date Midpoint Calculator

  Find the date exactly halfway between two dates, including dates BC.

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Working with more than a couple of dates? Put them on a timeline and see how they fit together.