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symmetric date generator

world's simplest time tool

With this browser-based application, you can find palindromic/symmetric calendar dates which show the same date when they are read from the left or right direction (for example, 2080-08-02 or 12-11-21). In the options, you can specify the number of palindromes you want to generate and set the date range where to look for them. You can switch between three padding modes (padded dates, non-padded dates, and mix-padded dates) and choose multiple date formats that include dash-separated and slash-separated dates, two-digit and four-digit years, and full dates that include days (YYYY-MM-DD format) or dates without days (YYYY-MM format). Created by computer nerds from team Browserling.

᠎᠎᠎        Tool Options

Palindrome Amount and Date Range

Specify the number of
palindromic dates you
want to find.
Start date.
End date.

Date Padding Mode

Generate dates with full-width
components. Here years will
have two or four digits and
months and days will have
two digits.
Generate dates with date
components having one
or two digits.
Generate dates with no
special padding rules in
date components.

Palindrome Date Format

Select the symmetrical date
format and composition.
For example, padded dates:
• "2021-12-02" (format YYYY-MM-DD)
• "22-11-22" (format YY-MM-DD)
• "2022-02" (format YYYY-MM)
• "21-12" (format YY-MM)
For example, non-padded dates:
• "2012/10/2" (format YYYY/MM/DD)
• "21/1/2" (format YY/MM/DD)
• "2020/2" (format YYYY/MM)
• "12-1" (format YY/MM)

What is a symmetric date generator?

This is a quick online utility for generating palindromic calendar dates. A calendar date is called palindromic or symmetrical if its digits from left to right are equal to the digits from right to left. For example, the date 2022/02 is palindromic, as well as dates 20/02, 21/12, 22-1-22, 2024-2-02, and 2030-03-02. People love such dates as they look more beautiful than regular dates and these dates are often used to designate important life events, such as a wedding or christening. Our program can find any number of symmetrical dates from the given date interval. For example, you can specify the start of the search interval to be "2015-01-01" and the end of the interval to be "2025-01-01", and you'll get two symmetrical dates in the format YYYY-MM-DD: "2020-02-02" and "2021-12-02". Depending on the palindromic date format that you select in the options, the program can find more symmetrical dates in the given range. If we look at the same range from "2015-01-01" to "2025-01-01" and if you have chosen an abbreviated calendar format YY-MM-DD where the year is represented as two digits, you'll get additional symmetrical dates such as "20-11-02", "21-11-12", and "22-11-22". You can also omit the day component from the dates and generate them in the YYYY-MM format. In this case, you'll get "2022-02". Additionally, an even shorter format YY-MM will produce dates "20-02" and "21-12". In the list of date formats, you can also select if a hyphen is used between date components (such as YYYY-MM-DD) or a slash (such as YYYY/MM/DD). There are also three radio options that let you choose the date padding mode. The dates where months and days begin with a zero, such as "20-02" and "2020-02-02" are called padded dates and can be generated via the "padded date" mode. If you switch to the "non-padded date" mode, you'll get palindromes like "2018-10-2", "22-1-22", "2020-2", or "24-2". Finally, in the "mixed date" padding mode, you'll get a list of palindromes that include fully padded dates, non-padded dates, and also dates that are neither padded, nor non-padded, such as "2016-1-02" or "20-9-02". Timeabulous!


Symmetric date generator examples

Click to try!

Full-width Palindromic Dates

In this example, we create a list of symmetric dates with all components (year-month-day) and with padding enabled, which means the components are full width (either four digits in length for the years or two digits in length for months and days). The center of symmetry of such dates is the first dash. If we place a mirror there, then relative to it, the digits to the left and right are the same. We generate 12 such dates in the twenty-first century and display them in a vertical column.

2030-03-02 2001-10-02 2010-01-02 2040-04-02 2080-08-02 2060-06-02 2011-11-02 2070-07-02 2050-05-02 2021-12-02 2020-02-02 2090-09-02
Required options
These options will be used automatically if you select this example.
Specify the number of
palindromic dates you
want to find.
Start date.
End date.
Generate dates with full-width
components. Here years will
have two or four digits and
months and days will have
two digits.
Select the symmetrical date
format and composition.

Non-padded Symmetric Dates

In this example, we turn on the non-padded date mode and select a shortened version of the date format, which uses only the last two digits in the year part (if the year is "2031", then it writes "31"). The center of symmetry in such dates may be in different places – the date "31-2-13" is mirror-symmetric with respect to the single month digit (the digit "2") and in the date "31-11-13", the center of symmetry is located between the two ones in the month part "11". We use the whole year 2031 as the search interval and create ten symmetric dates in it.

31-1-3 31-1-13 31-7-13 31-8-13 31-4-13 31-5-13 31-9-13 31-11-13 31-3-13 31-6-13
Required options
These options will be used automatically if you select this example.
Specify the number of
palindromic dates you
want to find.
Start date.
End date.
Generate dates with date
components having one
or two digits.
Select the symmetrical date
format and composition.

Symmetrical Years and Months

In this example, we drop the day component and find palindromic dates in the "YYYY/MM" format. We specify the range of years to be from 2020 to 2060 and extract 8 palindromic dates from it. We use the mixed padding date mode, which allows the tool to generate dates with some components being padded and some unpadded.

2020/2 2055/02 2033/02 2050/2 2030/2 2022/02 2044/02 2040/2
Required options
These options will be used automatically if you select this example.
Specify the number of
palindromic dates you
want to find.
Start date.
End date.
Generate dates with no
special padding rules in
date components.
Select the symmetrical date
format and composition.

Pro tips Master online time tools

You can pass options to this tool using their codes as query arguments and it will automatically compute output. To get the code of an option, just hover over its icon. Here's how to type it in your browser's address bar. Click to try!

https://onlinetools.com/time/generate-palindromic-calendar-dates?count=12&range-start=2000-01-01&range-end=2100-01-01&padded-date=true&format=YYYY-MM-DD

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Didn't find the tool you were looking for? Let us know what tool we are missing and we'll build it!

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These time tools are on the way!
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Draw a weird-looking clock that shows a particular time.

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Draw a π clock with π hours in a day.

Draw a 360° Clock

Draw a 360° clock with 360 degrees in a day.

Animate an Analog Clock

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.

Draw a Sunrise and Sunset Calendar

Draw a calendar that shows when the Sun rises and sets.

Draw a Moonrise and Moonset Calendar

Draw a calendar that shows when the Moon rises and sets.

Create an Animated Timer

Draw an animation that counts down (or up) time.

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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

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Draw Time as Bubbles

Visualize the given clock time as bubbles.

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Visualize the current year as bubbles.

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Visualize the given clock time as an arrow.

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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.

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Convert regular clock time to binary clock time (bintime).

Convert Date to Binary Date

Quickly regular calendar date to binary date (bindate).

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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).

Convert Date to Hex Date

Quickly regular calendar date to hexadecimal date (hexdate).

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Create a GIF animation of the Moon for a particular month.

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Create an animation of the Moon orbiting the Earth.

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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.

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Create a 687 day animation of the Mars orbiting the Sun.

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Create a 4,330 day animation of the Jupiter orbiting the Sun.

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Create a 10,756 day animation of the Saturn orbiting the Sun.

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Create a 30,687 day animation of the Uranus orbiting the Sun.

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Create a 90,560 day animation of the Pluto orbiting the Sun.

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Create an animation of Phobos and Deimos orbiting Mars.

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Generate a list of valid clock times (for testing).

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Generate Invalid Calendar Dates

Generate a list of invalid calendar dates (for testing).

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Create errors in the given calendar dates (for testing).

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Quickly find how many days have passed since start of the year.

Find Days Till the End of Year

Quickly find how many days are left till the end of the year.

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Quickly find how many days are left till a specific date.

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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

Find how old a bird would be if it was a human.

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Convert clock time on Earth to clock time on Mars.

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Convert clock time on Mars to clock time on Earth.

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Convert Earth time to Star Trek's stardate.

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Convert Star Trek's stardate to Earth time.

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Print a list of calendar dates with years equal months equal days.

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Print a list of all clock times when hands are in a straight line.

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Normalize Calendar Dates

Given calendar dates in various formats, make them the same format.

Rotate Clock Times

Cyclically shift HH, MM, SS time parts to the left or right.

Rotate Calendar Dates

Cyclically shift YYYY, MM, DD date parts to the left or right.

Freeform Time Calculator

Perform freeform clock time arithmetics.

Freeform Date Calculator

Perform freeform calendar date arithmetics.

Calculate Clock Sum

Find the sum of hours plus minutes plus seconds.

Calculate Calendar Sum

Find the sum of years plus months plus days.

Find Clock Sum

Find clock hand position so that hr + min + sec equals your value.

Find Calendar Sum

Find calendar date so that year + months + day equals your value.

Generate Clock Emojis

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Create Zalgo Time

Generate date and time that only Zalgo can understand.


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