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# Average date calculator

World's simplest time tool
With this browser-based application, you can find the average date of multiple calendar dates. You can calculate the middle point between two dates, or the average of three, four, or more dates. The program will find the average value as accurately as possible, up to a second. You also can calculate the running average for multiple dates, and change the calendar format for the average date in the output. Created by computer nerds from team Browserling.
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Moving Date Average
Output all the results of calculating the average of several dates step by step.
Average Date Format
Set the format of average date.
Create your own format for the average date. (You need to enable custom mode.)
• YYYY/YY – year, • MMMM/MMM/MM – month, • dddd/ddd – day of week, • DD – day, • hh – hour, • mm – minute, • ss – second.
Average Date Format
Display the average date with zero padding.
Display the average date with 12-hr time format.

## What is a average date calculator?

This is a quick online utility for calculating the average of two or more calendar dates. For example, you can find which day is the mid-spring by entering two dates: the beginning of spring (March 1) and the end of spring (May 31). The answer is noon on April 15. In a similar way, you can find the middle of a month, quarter, year, or century. You can also find the average of three or more calendar dates. Each date must be written on a new line using the format "YYYY-MM-DD hh:mm:ss" or "YYYY-MM-DD". For example, good inputs are: "2020-01-04 12:00:00" and "2030-10-23". The program then runs through the dates and calculates the average date using the formula "average = (d₁ + d₂ + … + dₙ)÷n", and displays the result in the output. You can also turn on the moving average mode (also known as rolling average and running average) in the options and get a list of sequential average date calculations as the output. Additionally, you can choose a format for the average date from a list of formats in the options or create a custom format using a pattern with the special date component abbreviations (such as YYYY, MM, DD, hh, mm, ss, and others). Two more options let you change the clock time format (switch between 12-hr and 24-hr modes) and add or remove zero padding to all date and time components. Timeabulous!

## Average date calculator examples

Click to use
Average of Two Calendar Dates
In this example, we calculate the average of two calendar dates. To do this, we enter both dates formatted as "YYYY-MM-DD hh:mm:ss" to the input (one per line). Then we set the output date format to be the same as the input date format and get the middle point between the two dates as the result.
2025-04-01 00:00:00 2025-05-12 00:00:00
2025-04-21 12:00:00
Required options
These options will be used automatically if you select this example.
Output all the results of calculating the average of several dates step by step.
Set the format of average date.
Create your own format for the average date. (You need to enable custom mode.)
Display the average date with zero padding.
Display the average date with 12-hr time format.
Find Running Date Average
In this example, we find the rolling average of three dates. We switch the output date format to text format with a 12-hour clock time and abbreviated month and day of the week names. On the first line of output, the program displays the same 1st date (because the average of just one date is the same date). On the second line, the program prints the average of the 1st and 2nd dates. On the third line, the program returns the average of the 1st, 2nd, and 3rd dates.
2015-08-15 12:00:00 2024-03-06 06:00:00 2002-05-24 18:00:00
Sat, Aug 15, 2015 12:0:0 pm Mon, Nov 25, 2019 9:0:0 am Fri, Jan 24, 2014 4:0:0 am
Required options
These options will be used automatically if you select this example.
Output all the results of calculating the average of several dates step by step.
Set the format of average date.
Create your own format for the average date. (You need to enable custom mode.)
Display the average date with zero padding.
Display the average date with 12-hr time format.
Custom Date Average
In this example, we find the average of two calendar dates without the time part. We discard the clock time from the output date by using a custom average date format. To do this, we select the "Custom" format mode in the list of formats and enter the date pattern YYYY_MM_DD, which separates the year, month, and day by an underscore symbol.
1995-02-05 2036-06-14
2015_10_10
Required options
These options will be used automatically if you select this example.
Output all the results of calculating the average of several dates step by step.
Set the format of average date.
Create your own format for the average date. (You need to enable custom mode.)
Display the average date with zero padding.
Display the average date with 12-hr time format.
Midpoint of a Common Year
In this example, we calculate the date and time of the middle point of a regular year, which has 365 days. The beginning of the year is 2023-01-01 00:00:00 and the end of the year is 2023-12-31 23:59:59. In the output, we get the midpoint of the year, which occurs in the summer of 2023-07-02 at exactly 12:00:00.
2023-01-01 00:00:00 2023-12-31 23:59:59
2023-07-02 12:00:00
Required options
These options will be used automatically if you select this example.
Output all the results of calculating the average of several dates step by step.
Set the format of average date.
Create your own format for the average date. (You need to enable custom mode.)
Display the average date with zero padding.
Display the average date with 12-hr time format.
Midpoint of a Leap Year
In this example, we find the median of the leap year 2024. This year consists of 366 days, which has one more day than a common year of 365 days. Because of this extra day, the midpoint of a leap year, as compared to a common year, is shifted by 12 hours, and is midnight of 2024-07-02.
2024-01-01 00:00:00 2024-12-31 23:59:59
2024-07-02 00:00:00
Required options
These options will be used automatically if you select this example.
Output all the results of calculating the average of several dates step by step.
Set the format of average date.
Create your own format for the average date. (You need to enable custom mode.)
Display the average date with zero padding.
Display the average date with 12-hr time format.
Median of the 21st Century
This example finds the midpoint of the entire 21st century. The current century runs from "2000-01-01 00:00:00" to "2099-12-31 23:59:59" and has one hundred years in it. We paste the beginning and end dates of the century into the input and find that the middle of the 21st century equals "2049-12-31 12:00:00".
2000-01-01 00:00:00 2099-12-31 23:59:59
2049-12-31 12:00:00
Required options
These options will be used automatically if you select this example.
Output all the results of calculating the average of several dates step by step.
Set the format of average date.
Create your own format for the average date. (You need to enable custom mode.)
Display the average date with zero padding.
Display the average date with 12-hr time format.
Pro tips Master online time tools
You can pass input to this tool via ?input query argument and it will automatically compute output. Here's how to type it in your browser's address bar. Click to try!
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Quickly draw an analog clock that shows a particular time.
Quickly draw a digital clock that shows a particular time.
Quickly draw a monthly calendar for any month of the year.
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Quickly print a list of neat-looking calendar dates (such as 2055-05-05).
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Quickly convert seconds to clock time in H:M:S format.
Quickly convert time in 24 hour format to 12 hour format.
Quickly convert time in 12 hour format to 24 hour format.
Quickly find how many seconds have passed since midnight.
Quickly find how many seconds are left till midnight.
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Quickly find the difference between two calendar dates.
Quickly find the age difference between two or more people.
Quickly add hours, minutes, and seconds to the given time.
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Quickly add days, months, and years to the given date.
Quickly subtract days, months, and years to from the given date.
Quickly change the current time format to any new format.
Quickly change the current date format to any new format.
Quickly round the given clock time up or down.
Quickly round the given calendar date up or down.
Quickly drop seconds and minutes from a clock time.
Quickly drop days and months from a calendar date.
Quickly sort clock times in ascending or descending order.
Quickly sort calendar dates in ascending or descending order.
Quickly sort time intervals by their start time or length.
Quickly sort date intervals by their start date or length.
Quickly check if the given clock time is valid.
Quickly check if the given calendar date is valid.
Quickly find how many hours are in the given days.
Quickly find how many days are in the given hours.
Quickly find the astrological sign by the birthday or any date.
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Quickly find the average value of multiple clock times.
Quickly find the average value of multiple calendar dates.
Quickly generate a list of random clock times.
Quickly generate a list of random calendar dates.
Quickly create a list of clock times that match your criteria.
Quickly generate a list of calendar dates that match your criteria.
Quickly split the given time period into multiple intervals.
Quickly split the given date period into multiple intervals.
Quickly generate increasing or decreasing clock times.
Quickly generate increasing or decreasing calendar dates.
Quickly print a list of all leap years.
Quickly print a list of all common years.
Quickly test if the given year is a leap year.
Quickly test if the given year is a common year.
Quickly find how old a cat would be if it was a human.
Quickly find how old a human would be if he/she was a cat.
Quickly find how old a dog would be if it was a human.
Quickly find how old a human would be if it was a dog.
Quickly convert a modern Gregorian date to a Julian date.
Quickly convert an ancient Julian date to a Gregorian date.
Quickly calculate the Julian day number for any calendar date.
Quickly convert the Julian day to a regular calendar date.
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Quickly convert human-readable time to a UNIX Epoch time.
Quickly generate increasing or decreasing UNIX timestamps.
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Quickly add slight perturbations to the given clock times.
Quickly add slight perturbations to the given calendar dates.
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Quickly find what week of the year the given calendar date falls on.
Quickly calculate the calendar date from a day number of a year.
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Quickly create a list of all New Year dates.
Quickly create a list of all Thanksgiving dates.
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Quickly convert time and date from one timezone to another.
Quickly convert time and date from one country to another.
Quickly print the season (winter, spring, summer, autumn) by date.
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Draw a binary clock that shows time in base two.
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Draw a Weird Clock
Draw a weird-looking clock that shows a particular time.
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Create a GIF animation of an analog clock.
Animate a Digital Clock
Create a GIF animation of a digital clock.
Animate a Broken Clock
Create a GIF animation of a clock that's broken.
Draw a Daily Calendar
Draw a daily calendar for a single day.
Draw a Weekly Calendar
Draw a weekly calendar for any week of the month.
Draw a Yearly Calendar
Draw a yearly calendar for the entire year.
Draw a Lunar Calendar
Draw a calendar that shows moon phases.
Draw a Solar Calendar
Draw a calendar that shows the seasons and Sun's position.
Create an Animated Timer
Draw an animation that counts down (or up) time.
Animate an Hourglass
Create a GIF animation of a sand clock.
Draw an Infinite Spiral Clock
Animate a timeless clock that goes in an infinite spiral.
Draw Time as a Pie Chart
Visualize the given clock time as a pie chart.
Draw Date as a Pie Chart
Visualize the current year as a pie chart.
Draw Time as a Bar Chart
Visualize the given clock time as a bar chart.
Draw Date as a Bar Chart
Visualize the current year as a bar chart.
Draw Time as a Pixel Wall
Visualize the given clock time as a pixel wall (1px = 1sec).
Draw Date as a Pixel Wall
Visualize the current year as a pixel wall (1px = 1day).
Draw Time as Bubbles
Visualize the given clock time as bubbles.
Draw Date as Bubbles
Visualize the current year as bubbles.
Draw a Time Arrow
Visualize the given clock time as an arrow.
Convert Time to Percentage
Quickly calculate time passed and left in the current day as pct.
Convert Date to Percentage
Quickly calculate time passed and left in the current year as pct.
Convert Time to Binary Time
Convert regular clock time to binary clock time (bintime).
Convert Date to Binary Date
Quickly regular calendar date to binary date (bindate).
Convert Time to Decimal Time
Convert regular clock time to decimal clock time (dectime).
Convert Date to Decimal Date
Quickly regular calendar date to decimal date (decdate).
Convert Time to Hex Time
Convert regular clock time to hexadecimal time (hextime).
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Quickly regular calendar date to hexadecimal date (hexdate).
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Create a GIF animation of the Moon for a particular month.
Animate Moon's Orbit
Create an animation of the Moon orbiting the Earth.
Animate Mercury's Orbit
Create a 88 day animation of the Mercury orbiting the Sun.
Animate Venus's Orbit
Create a 225 day animation of the Venus orbiting the Sun.
Animate Earth's Orbit
Create a 365 day animation of the Earth orbiting the Sun.
Animate Mars's Orbit
Create a 687 day animation of the Mars orbiting the Sun.
Animate Jupiter's Orbit
Create a 4,330 day animation of the Jupiter orbiting the Sun.
Animate Saturn's Orbit
Create a 10,756 day animation of the Saturn orbiting the Sun.
Animate Uranus's Orbit
Create a 30,687 day animation of the Uranus orbiting the Sun.
Animate Neptune's Orbit
Create a 60,190 day animation of the Neptune orbiting the Sun.
Animate Pluto's Orbit
Create a 90,560 day animation of the Pluto orbiting the Sun.
Animate Solar System
Create an animation of all planets in the Solar System.
Animate Mars's Moons
Create an animation of Phobos and Deimos orbiting Mars.
Animate Jupiter's Moons
Animate Io, Europa, Ganymede, Callisto orbiting Jupiter.
Animate Saturn's Moons
Animate Titan, Rhea, Iapetus, Enceladus orbiting Saturn.
Animate Uranus's Moons
Animate Titania, Oberon, Umbriel, Ariel, Miranda orbiting Uranus.
Animate Neptune's Moons
Animate Triton, Nereid, and Proteus orbiting Neptune.
Animate Pluto's Moons
Animate Charon, Nix, Hydra, Kerberos, Styx orbiting Pluto.
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Find dates when two or more planets align in a straight line.
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Find dates when the solar eclipse happens.
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Find dates when the lunar eclipse happens.
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Create a Date Matrix
Represent a calendar date as a matrix.
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Represent a clock time as a vector.
Create a Date Vector
Represent a calendar date as a vector.
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Draw a time series chart.
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Generate Overlapping Times
Generate a bunch of overlapping time intervals.
Generate Non-overlapping Times
Generate a bunch of non-overlapping time intervals.
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Generate random clock time intervals.
Find Overlapping Dates
Given a bunch of date intervals, find overlapping intervals.
Generate Overlapping Dates
Generate a bunch of overlapping date intervals.
Generate Non-overlapping Dates
Generate a bunch of non-overlapping date intervals.
Generate Random Date Intervals
Generate random calendar date intervals.
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Invert Clock Time
Find the inverse of the given clock time.
Shift Clock Time
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Generate a list of valid clock times (for testing).
Generate Invalid Clock Times
Generate a list of invalid clock times (for testing).
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Generate a list of valid calendar dates (for testing).
Generate Invalid Calendar Dates
Generate a list of invalid calendar dates (for testing).
Create errors in the given clock times (for testing).
Create errors in the given calendar dates (for testing).
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Convert a calendar date to seconds.
Convert Seconds to Date
Convert seconds to a calendar date.
Convert English to Crontab
Create a crontab expression from human language.
Convert Crontab to English
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Find Days Since the Start of Year
Quickly find how many days have passed since start of the year.
Find Days Till the End of Year
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Find Days Till a Specific Date
Quickly find how many days are left till a specific date.
Convert Seconds To Minutes
Find how many minutes are in the given seconds.
Convert Seconds To Hours
Find how many hours are in the given seconds.
Convert Seconds to Days
Find how many days are in the given seconds.
Convert Seconds to Weeks
Find how many weeks are in the given seconds.
Convert Seconds to Months
Find how many months are in the given seconds.
Convert Seconds to Years
Find how many years are in the given seconds.
Convert Minutes to Seconds
Find how many seconds are in the given minutes.
Convert Minutes To Hours
Find how many hours are in the given minutes.
Convert Minutes to Days
Find how many days are in the given minutes.
Convert Minutes to Weeks
Find how many weeks are in the given minutes.
Convert Minutes to Months
Find how many months are in the given minutes.
Convert Minutes to Years
Find how many years are in the given minutes.
Convert Hours To Seconds
Find how many seconds are in the given hours.
Convert Hours to Minutes
Find how many minutes are in the given hours.
Convert Hours to Weeks
Find how many weeks are in the given hours.
Convert Hours to Months
Find how many months are in the given hours.
Convert Hours to Years
Find how many years are in the given hours.
Convert Days to Seconds
Find how many seconds are in the given days.
Convert Days to Minutes
Find how many minutes are in the given days.
Convert Days to Weeks
Find how many weeks are in the given days.
Convert Days to Months
Find how many months are in the given days.
Convert Days to Years
Find how many years are in the given days.
Convert Weeks to Seconds
Find how many seconds are in the given weeks.
Convert Weeks To Minutes
Find how many minutes are in the given weeks.
Convert Weeks To Hours
Find how many hours are in the given weeks.
Convert Weeks to Days
Find how many days are in the given weeks.
Convert Weeks to Months
Find how many months are in the given weeks.
Convert Weeks to Years
Find how many years are in the given weeks.
Convert Months to Seconds
Find how many seconds are in the given months.
Convert Months To Minutes
Find how many minutes are in the given months.
Convert Months To Hours
Find how many hours are in the given months.
Convert Months to Days
Find how many days are in the given months.
Convert Months to Weeks
Find how many weeks are in the given months.
Convert Months to Years
Find how many years are in the given months.
Convert Years to Seconds
Find how many seconds are in the given years.
Convert Years To Minutes
Find how many minutes are in the given years.
Convert Years To Hours
Find how many hours are in the given years.
Convert Years to Days
Find how many days are in the given years.
Convert Years to Weeks
Find how many weeks are in the given years.
Convert Years to Months
Find how many months are in the given years.
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Find how old a human would be if he/she was a bird.
Convert a Human's Age to Bird Years
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Convert clock time on Earth to clock time on Mars.
Convert Mars Time to Earth Time
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Print a list of calendar dates with years equal months equal days.
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Freeform Date Calculator
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Find the sum of years plus months plus days.
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Find calendar date so that year + months + day equals your value.
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