With this browser-based application, you can check if a calendar date exists and is correct. It tests if the date (and optional time) is well-formatted and also analyzes the limits of each date component. You can validate as many calendar dates as you want, choose the date status format, and print a descriptive error message. Created by computer nerds from team Browserling.
With this browser-based application, you can check if a calendar date exists and is correct. It tests if the date (and optional time) is well-formatted and also analyzes the limits of each date component. You can validate as many calendar dates as you want, choose the date status format, and print a descriptive error message. Created by computer nerds from team Browserling.
This is a quick online utility for validating calendar dates. The date validation algorithm that we implemented checks the format of a date, the components of a date, and verifies the date exists (for example, a leap year exists only once every 4 years). Once the validation is complete, it displays the result of the test on the screen. If the date is correct, the tool prints "Date is valid" (or just "Valid" if the short message form is enabled). If the date is incorrect, the tool prints "Date is invalid" (or "Invalid" in the short form). The first thing the program checks is that the date has a correct format and that all parts of the date contain only numbers. A valid full date format is "YYYY-MM-DD hh:mm:ss", however it can also be shortened to "YYYY-MM-DD hh:mm", "YYYY-MM-DD hh", "YYYY-MM-DD", "YYYY-MM", or just "YYYY". The program then checks each date component individually. The year must be at least -271821 (which is 271821 BC) and must not exceed 275760 (AC). For months, valid values are from 1 to 12. The dates in each month may differ, some months have 28 days, some 29, some 30, and some 31. The program checks the number of days in each month separately and displays an error if the number of days in that month are exceeded. If the input date has a clock time part, then it's also run through a number of checks. In particular, the maximum time is limited to 24:00:00, the minutes must not exceed 59m, and the seconds must not exceed 59s. To validate multiple calendar dates, enter them one per line into the input field. To get a shortened status check result use the "Short Status" checkbox option and to display a detailed description of the date error, use the checkbox "Show Detailed Error". Timeabulous!
This is a quick online utility for validating calendar dates. The date validation algorithm that we implemented checks the format of a date, the components of a date, and verifies the date exists (for example, a leap year exists only once every 4 years). Once the validation is complete, it displays the result of the test on the screen. If the date is correct, the tool prints "Date is valid" (or just "Valid" if the short message form is enabled). If the date is incorrect, the tool prints "Date is invalid" (or "Invalid" in the short form). The first thing the program checks is that the date has a correct format and that all parts of the date contain only numbers. A valid full date format is "YYYY-MM-DD hh:mm:ss", however it can also be shortened to "YYYY-MM-DD hh:mm", "YYYY-MM-DD hh", "YYYY-MM-DD", "YYYY-MM", or just "YYYY". The program then checks each date component individually. The year must be at least -271821 (which is 271821 BC) and must not exceed 275760 (AC). For months, valid values are from 1 to 12. The dates in each month may differ, some months have 28 days, some 29, some 30, and some 31. The program checks the number of days in each month separately and displays an error if the number of days in that month are exceeded. If the input date has a clock time part, then it's also run through a number of checks. In particular, the maximum time is limited to 24:00:00, the minutes must not exceed 59m, and the seconds must not exceed 59s. To validate multiple calendar dates, enter them one per line into the input field. To get a shortened status check result use the "Short Status" checkbox option and to display a detailed description of the date error, use the checkbox "Show Detailed Error". Timeabulous!
This example verifies two calendar dates. It checks the year, month, and date of each date and prints the result to the output text area. The first date is valid but the second date is invalid because there are a maximum of 12 months in a year but the date has "13" in the month component.
In this example, we enter many calendar dates as the input and quickly analyze the validity of all dates. We also activate the verbose error option so that we can instantly find and fix errors in calendar dates.
In this example, we catch all the incorrect dates in a long list of dates. We use the short status output format and also add a short error description in parentheses to each invalid date.
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!
