With this browser-based application, you can turn the given list of calendar dates into a similar list with slight date perturbations. You can change a date by a random interval, which is expressed in days, months, years, hours, minutes, and seconds. You can control the fuzziness direction and get a slightly incremented date or a slightly decremented date. The deviation amount is controlled by setting the minimum and maximum fuzziness values in the options. You can also customize the fuzzed date format, change the clock format, and control the date and time component padding. Created by computer nerds from team Browserling.
With this browser-based application, you can turn the given list of calendar dates into a similar list with slight date perturbations. You can change a date by a random interval, which is expressed in days, months, years, hours, minutes, and seconds. You can control the fuzziness direction and get a slightly incremented date or a slightly decremented date. The deviation amount is controlled by setting the minimum and maximum fuzziness values in the options. You can also customize the fuzzed date format, change the clock format, and control the date and time component padding. Created by computer nerds from team Browserling.
This is a quick online utility for adding fuzziness to a calendar date. When a calendar date is made fuzzy, its value is perturbed and a minor random deviation from its original value is created. The fuzziness can increase or decrease a date by a random number of days, months, years, and optionally hours, minutes, and seconds. This random number is called the fuzziness parameter and it's set by changing the primary fuzziness option. For example, you can specify the fuzziness parameter equal to "2 days", "3 months", "1 year", "1 day 10 hours", or "2 months 10 minutes". Our program accepts multiple dates as the input, entered one per line, in the format "YYYY-MM-DD" or "YYYY-MM-DD hh:mm:ss". For example, you can enter the date "2025-04-10 00:00:00" and perturb it by 1 day. In this case, the perturbation algorithm will first generate a random value from 0 seconds to 1 day (86400 seconds) and then it will increase or decrease the date by this amount. As a result, you'll get dates such as "2025-04-10 12:35:55", "2025-04-09 01:20:24", or "2025-04-11 01:23:10" as the output. To prevent too small date deviations (such as 1 second), you can also specify the minimum fuzzy interval in the options. For example, if we keep 1 day as the initial perturbation value and set the minimum perturbation value to 12 hours, then the program will generate a random value from 12 hours (43200 seconds) to 1 day (86400 seconds), and increase or decrease the date by this larger value. If you always need to only increment a date, you can put a "+" sign in front of the fuzzy value, such as "+1 day", or "+2 months 20 hours". If you always need to only decrement a date, use the "-" sign, such as "-2 years", "-1 month 3 days". In addition to controlling the fuzziness, you can also adjust the fuzzy date format in the output. The date format can use all or some of the date components and they can be put in any order. Also, the names of months and days of the week can be printed as text in both the short and long forms. The most popular date formats are available in the date format list option and you can also create custom and original date formats. To do it, you need to select the custom date format mode from the list and enter a date pattern using the special abbreviations for individual time components. Additionally, you can control the padding of date components via a checkbox option. If your dates have the clock time part, you can adjust the clock format – you can turn all the clocks into a 12-hour format, turn them into a 24-hour format, or keep the original clock format. Timeabulous!
This is a quick online utility for adding fuzziness to a calendar date. When a calendar date is made fuzzy, its value is perturbed and a minor random deviation from its original value is created. The fuzziness can increase or decrease a date by a random number of days, months, years, and optionally hours, minutes, and seconds. This random number is called the fuzziness parameter and it's set by changing the primary fuzziness option. For example, you can specify the fuzziness parameter equal to "2 days", "3 months", "1 year", "1 day 10 hours", or "2 months 10 minutes". Our program accepts multiple dates as the input, entered one per line, in the format "YYYY-MM-DD" or "YYYY-MM-DD hh:mm:ss". For example, you can enter the date "2025-04-10 00:00:00" and perturb it by 1 day. In this case, the perturbation algorithm will first generate a random value from 0 seconds to 1 day (86400 seconds) and then it will increase or decrease the date by this amount. As a result, you'll get dates such as "2025-04-10 12:35:55", "2025-04-09 01:20:24", or "2025-04-11 01:23:10" as the output. To prevent too small date deviations (such as 1 second), you can also specify the minimum fuzzy interval in the options. For example, if we keep 1 day as the initial perturbation value and set the minimum perturbation value to 12 hours, then the program will generate a random value from 12 hours (43200 seconds) to 1 day (86400 seconds), and increase or decrease the date by this larger value. If you always need to only increment a date, you can put a "+" sign in front of the fuzzy value, such as "+1 day", or "+2 months 20 hours". If you always need to only decrement a date, use the "-" sign, such as "-2 years", "-1 month 3 days". In addition to controlling the fuzziness, you can also adjust the fuzzy date format in the output. The date format can use all or some of the date components and they can be put in any order. Also, the names of months and days of the week can be printed as text in both the short and long forms. The most popular date formats are available in the date format list option and you can also create custom and original date formats. To do it, you need to select the custom date format mode from the list and enter a date pattern using the special abbreviations for individual time components. Additionally, you can control the padding of date components via a checkbox option. If your dates have the clock time part, you can adjust the clock format – you can turn all the clocks into a 12-hour format, turn them into a 24-hour format, or keep the original clock format. Timeabulous!
In this example, we use our date fuzzer for an astronomical research problem. To create a testing set for a future satellite launch, we need to generate ten calendar dates that are within one day of the date 2030-06-16 12:00:00. We enter this date ten times in the input and set the perturbation option to "1 day", which means – change all dates by any amount that is not bigger than 1 day. As a result, the program picks a random number from 0 (0 days) to 86400 (1 day) and adds or subtracts this number (as seconds) from each input date. We also switch to a new date format and get slash-separated dates in the output.
This example applies random increments to five calendar dates. It uses a fuzzy value with a plus sign "+2 months", which means that the algorithm creates only positive date deviations and all fuzzed dates are larger than the given dates. The deviations also have a restraint on its minimum value and it's set to "1 month". This restriction makes the program use only values between 1 month and 2 months for fuzzing. For the output, we choose a date format that includes the textual names of the months and days of the week. We also turn off the padding for numerical date components and convert all clock times to a 12-hour am/pm format.
In this example, we specify the minimum fuzziness value equal to "1 year" and the maximum fuzziness value equal to "1 year 6 months". These min-max interval values increment or decrement each date by at least 1 year, which adds a large amount of fuzziness to the eight input dates from different centuries. We switch to the custom date format mode and create a date template without the time part "MM.DD.YYYY".
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!
Draw a binary clock that shows time in base two.
Draw a clock in Salvador Dali style showing custom time.
Draw a weird-looking clock that shows a particular time.
Draw a π clock with π hours in a day.
Draw a 360° clock with 360 degrees in a day.
Create a GIF animation of an analog clock.
Create a GIF animation of a digital clock.
Create a GIF animation of a clock that's broken.
Draw a daily calendar for a single day.
Draw a weekly calendar for any week of the month.
Draw a yearly calendar for the entire year.
Draw a calendar that shows moon phases.
Draw a calendar that shows the seasons and Sun's position.
Draw a calendar that shows when the Sun rises and sets.
Draw a calendar that shows when the Moon rises and sets.
Draw an animation that counts down (or up) time.
Create a GIF animation of a sand clock.
Animate a timeless clock that goes in an infinite spiral.
Visualize the given clock time as a pie chart.
Visualize the current year as a pie chart.
Visualize the given clock time as a bar chart.
Visualize the current year as a bar chart.
Visualize the given clock time as a pixel wall (1px = 1sec).
Visualize the current year as a pixel wall (1px = 1day).
Visualize the given clock time as bubbles.
Visualize the current year as bubbles.
Visualize the given clock time as an arrow.
Quickly calculate time passed and left in the current day as pct.
Quickly calculate time passed and left in the current year as pct.
Convert regular clock time to binary clock time (bintime).
Quickly regular calendar date to binary date (bindate).
Convert regular clock time to decimal clock time (dectime).
Quickly regular calendar date to decimal date (decdate).
Convert regular clock time to hexadecimal time (hextime).
Quickly regular calendar date to hexadecimal date (hexdate).
Create a GIF animation of the Moon for a particular month.
Create an animation of the Moon orbiting the Earth.
Create a 88 day animation of the Mercury orbiting the Sun.
Create a 225 day animation of the Venus orbiting the Sun.
Create a 365 day animation of the Earth orbiting the Sun.
Create a 687 day animation of the Mars orbiting the Sun.
Create a 4,330 day animation of the Jupiter orbiting the Sun.
Create a 10,756 day animation of the Saturn orbiting the Sun.
Create a 30,687 day animation of the Uranus orbiting the Sun.
Create a 60,190 day animation of the Neptune orbiting the Sun.
Create a 90,560 day animation of the Pluto orbiting the Sun.
Create an animation of all planets in the Solar System.
Create an animation of Phobos and Deimos orbiting Mars.
Animate Io, Europa, Ganymede, Callisto orbiting Jupiter.
Animate Titan, Rhea, Iapetus, Enceladus orbiting Saturn.
Animate Titania, Oberon, Umbriel, Ariel, Miranda orbiting Uranus.
Animate Triton, Nereid, and Proteus orbiting Neptune.
Animate Charon, Nix, Hydra, Kerberos, Styx orbiting Pluto.
Find dates when two or more planets align in a straight line.
Find dates when the solar eclipse happens.
Find dates when the lunar eclipse happens.
Calculate your age based on the orbital period of other planets.
Represent a clock time as a matrix.
Represent a calendar date as a matrix.
Represent a clock time as a vector.
Represent a calendar date as a vector.
Draw a time series chart.
Given a bunch of time intervals, find overlapping intervals.
Generate a bunch of overlapping time intervals.
Generate a bunch of non-overlapping time intervals.
Generate random clock time intervals.
Given a bunch of date intervals, find overlapping intervals.
Generate a bunch of overlapping date intervals.
Generate a bunch of non-overlapping date intervals.
Generate random calendar date intervals.
Swap a clock's hour hand with minute hand.
Find the reverse of the given clock time.
Find the inverse of the given clock time.
Shift the given clock time by any time interval.
Change the clock scale from 24 hours to any other hours.
Generate a list of valid clock times (for testing).
Generate a list of invalid clock times (for testing).
Generate a list of valid calendar dates (for testing).
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).
Convert a calendar date to seconds.
Convert seconds to a calendar date.
Create a crontab expression from human language.
Rewrite a crontab entry into human language.
Quickly find the week of the month of a calendar date.
Quickly find how many days have passed since start of the year.
Quickly find how many days are left till the end of the year.
Quickly find how many days are left till a specific date.
Find how many minutes are in the given seconds.
Find how many hours are in the given seconds.
Find how many days are in the given seconds.
Find how many weeks are in the given seconds.
Find how many months are in the given seconds.
Find how many years are in the given seconds.
Find how many seconds are in the given minutes.
Find how many hours are in the given minutes.
Find how many days are in the given minutes.
Find how many weeks are in the given minutes.
Find how many months are in the given minutes.
Find how many years are in the given minutes.
Find how many seconds are in the given hours.
Find how many minutes are in the given hours.
Find how many weeks are in the given hours.
Find how many months are in the given hours.
Find how many years are in the given hours.
Find how many seconds are in the given days.
Find how many minutes are in the given days.
Find how many weeks are in the given days.
Find how many months are in the given days.
Find how many years are in the given days.
Find how many seconds are in the given weeks.
Find how many minutes are in the given weeks.
Find how many hours are in the given weeks.
Find how many days are in the given weeks.
Find how many months are in the given weeks.
Find how many years are in the given weeks.
Find how many seconds are in the given months.
Find how many minutes are in the given months.
Find how many hours are in the given months.
Find how many days are in the given months.
Find how many weeks are in the given months.
Find how many years are in the given months.
Find how many seconds are in the given years.
Find how many minutes are in the given years.
Find how many hours are in the given years.
Find how many days are in the given years.
Find how many weeks are in the given years.
Find how many months are in the given years.
Find how old a human would be if he/she was a bird.
Find how old a bird would be if it was a human.
Convert clock time on Earth to clock time on Mars.
Convert clock time on Mars to clock time on Earth.
Convert Earth time to Star Trek's stardate.
Convert Star Trek's stardate to Earth time.
Print a list of clock times with hours equal mins equal secs.
Print a list of calendar dates with years equal months equal days.
Print a list of all clock times when hands are in a straight line.
Given clock times in various formats, convert them to one format.
Given calendar dates in various formats, make them the same format.
Cyclically shift HH, MM, SS time parts to the left or right.
Cyclically shift YYYY, MM, DD date parts to the left or right.
Perform freeform clock time arithmetics.
Perform freeform calendar date arithmetics.
Find the sum of hours plus minutes plus seconds.
Find the sum of years plus months plus days.
Find clock hand position so that hr + min + sec equals your value.
Find calendar date so that year + months + day equals your value.
Print all clock icons from 00:00 to 24:00.
Generate date and time that only Zalgo can understand.
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We're Browserling — a friendly and fun cross-browser testing company powered by alien technology. At Browserling our mission is to make people's lives easier, so we created this collection of time and date tools. All our tools share the same user interface, so as soon as you learn how to use one of the tools, you'll be a master of all tools. Behind the scenes, our time and date tools are actually powered by our web developer tools that we created over the last couple of years. Check them out!
