# Day of the Year Calculator

## World's Simplest Time Tool

With this browser-based application, you can find the day of the year for any given calendar date. It counts the number of days that have passed since the beginning of the given year until it reaches the given date and outputs this number. You can enter multiple calendar dates at once and get results for each date. You can also print the original dates in the output to visually see the day count and the date at the time. Note that the day count changes depending on if it's a leap year or a common year. Created by computer nerds from team Browserling.

Tool Options

#### Date Output

Display the given calendar date
next to the day counter value.

## What Is a Day of the Year Calculator?

This is a quick online utility for calculating the day number of any calendar date. It accepts any date as the input and finds out which day since the beginning of the year it is. For example, for the date 2024-01-01, the program will display "1", which means it's the 1st day of the year; for the date 2024-02-19, the program will display "50" as it's the 50th day of the year; and for the date 2024-12-31, the program will display "366" as it's the 366th day of the year (this year is a leap year). If the year is a common year, such as 2025-12-31, then the program will display "365" as common years have 365 days. You can find the year days for multiple calendar dates at once by entering each date on a separate line in the input field. The result for each date is printed in the corresponding output field. To always be able to understand which result is for which date, you can also print the given calendar date next to the day number. Timeabulous!

## Day of the Year Calculator Examples

Click to try!
click me

### Summer Solstice Day

In this example, we calculate which day of the year the summer solstice of 2022 occurs. The summer solstice, also called midsummer, happens on June 21, 2022, so we enter this date in the input and find in the output that it's the 172nd day of the year.

2022-06-21
172
Required options
These options will be used automatically if you select this example.
Display the given calendar date
next to the day counter value.
click me

### Season Days

In this example, we find the day number for the beginning date of each season in a leap year and a common year. We take 2025 as a common year and enter four dates for it: the beginning of spring (2025-03-01), the beginning of summer (2025-06-01), the beginning of autumn (2025-09-01), and the beginning of winter (2025-12-01). For a leap year, we use the year 2024 and enter the same dates. The output shows the day of the year for each season and we print them together with the original input season dates.

2025-03-01 2025-06-01 2025-09-01 2025-12-01 2024-03-01 2024-06-01 2024-09-01 2024-12-01
2025-03-01 is 60th day of the year. 2025-06-01 is 152nd day of the year. 2025-09-01 is 244th day of the year. 2025-12-01 is 335th day of the year. 2024-03-01 is 61st day of the year. 2024-06-01 is 153rd day of the year. 2024-09-01 is 245th day of the year. 2024-12-01 is 336th day of the year.
Required options
These options will be used automatically if you select this example.
Display the given calendar date
next to the day counter value.
click me

### The Tens

In this example, we generate day counter values for all calendar dates that are 10 days apart and that are divisible by 10. The list starts on 2015-01-10, which is the 10th day, and then each next day is incremented by 10, so the next one is 2015-01-20 (20th day), 2015-01-30 (30th day), etc.

2015-01-10 2015-01-20 2015-01-30 2015-02-09 2015-02-19 2015-03-01 2015-03-11 2015-03-21 2015-03-31 2015-04-10 2015-04-20 2015-04-30 2015-05-10 2015-05-20 2015-05-30 2015-06-09 2015-06-19 2015-06-29 2015-07-09 2015-07-19 2015-07-29 2015-08-08 2015-08-18 2015-08-28 2015-09-07 2015-09-17 2015-09-27 2015-10-07 2015-10-17 2015-10-27 2015-11-06 2015-11-16 2015-11-26 2015-12-06 2015-12-16 2015-12-26
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 320 330 340 350 360
Required options
These options will be used automatically if you select this example.
Display the given calendar date
next to the day counter value.
click me

### Magic Day Numbers

This example shows various magic day numbers. A magic day number is either a round number, such as 100, 200, 300, or it has repeating digits, such as 101, 111, 202, 222, 303, 333, or it has increasing or decreasing digit sequences, such as 123 and 321.

2022-04-10 2022-04-11 2022-04-21 2022-05-03 2022-07-19 2022-07-21 2022-07-31 2022-08-10 2022-10-27 2022-10-30 2022-11-17 2022-11-29
100 101 111 123 200 202 212 222 300 303 321 333
Required options
These options will be used automatically if you select this example.
Display the given calendar date
next to the day counter value.
click me

### Fibonacci Days

In this example, the mischievous troublemaker Fibonacci once again had a go at our day counting algorithm. His first idea was to try finding Fibonacci days. These are the days that correspond to Fibonacci numbers. It turns out there are 13 days in every year that correspond to Fibonacci numbers. Here they are for the year 2020, which is a leap year. For a common year, they would be off by one starting from the March date.

2020-01-01 2020-01-01 2020-01-02 2020-01-03 2020-01-05 2020-01-08 2020-01-13 2020-01-21 2020-02-03 2020-02-24 2020-03-29 2020-05-23 2020-08-20
1 1 2 3 5 8 13 21 34 55 89 144 233
Required options
These options will be used automatically if you select this example.
Display the given calendar date
next to the day counter value.
click me

### Pi Digits Days

In this example, we let another mathematician play with our tool. She immediately decided to find all calendar days that correspond to the constant pi 3.1415926535. The first day is the whole part of pi, which equals 3, and the next five days are pairs of pi digits – 14, 15, 92, 65, and 35.

2022-01-03 2022-01-14 2022-01-15 2022-04-02 2022-03-06 2022-02-04
3 14 15 92 65 35
Required options
These options will be used automatically if you select this example.
Display the given calendar date
next to the day counter value.

### Pro tipsMaster 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!

https://onlinetools.com/time/find-day-of-year?input=2022-06-21&print-date=false

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Quickly add hours, minutes, and seconds to the given time.
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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.
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Quickly generate a list of random clock times.
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Quickly generate increasing or decreasing clock times.
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Quickly test if the given year is a common year.
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### Coming Soon

These time tools are on the way!
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Draw a binary clock that shows time in base two.

Draw a Salvador Dali Clock

Draw a clock in Salvador Dali style showing custom time.

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Draw a weird-looking clock that shows a particular time.

Draw a Pi Clock

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.

Animate an Hourglass

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Draw an Infinite Spiral Clock

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Draw Time as a Pie Chart

Visualize the given clock time as a pie chart.

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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

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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).

Animate Moon's Phases

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

Animate Moon's Orbit

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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.

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

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Create a 60,190 day animation of the Neptune 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 all planets in the Solar System.

Animate Mars's Moons

Create an animation of Phobos and Deimos orbiting Mars.

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Generate a bunch of overlapping date intervals.

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Generate a bunch of non-overlapping date intervals.

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

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

Find Days Till a Specific Date

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.

Convert a Bird's Age to Human Years

Find how old a human would be if he/she was a bird.

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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.

Convert Mars Time to Earth Time

Convert clock time on Mars to clock time on Earth.

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Convert Stardate to Earth Date/Time

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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

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Freeform Time Calculator

Perform freeform clock time arithmetics.

Freeform Date Calculator

Perform freeform calendar date arithmetics.

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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

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### Created with love by

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!