Day of the Year Calculator

Have you ever stopped to calculate the day of the year we are at or what day in the year you were born? The day of the year calculator is just the tool you need to do this in a few seconds. This intuitive tool calculates the following:

• What numbered day of the year it is;
• How many days there are until the end of the year;
• The day of the year of any date you enter; and
• How many days are left in the year from a given date.

Additionally, this accompanying article includes information on the following:

• What the term day of the year means;
• The number of days in a year;
• How to calculate the day of the year;
• How to use our day of the year calculator; and
• How to calculate the number of days that are left in a year.

The term day of the year refers to the days in our calendar year numbered in sequential order. The 1st of January is considered day 1, while the 31st of December is day 365 in a non-leap year and 366 in a leap year.

There are 366 days in a leap year and 365 days in a non-leap year. The difference always appears in the month of February, which has 29 days in a leap year and 28 days in a non-leap year.

Calculating the number of days left in the year is a pretty simple task. To do this, follow these steps:

1. Find out whether it is a leap year or not. For this exercise, let's assume you are calculating for a non-leap year.

2. Calculate what numbered day of the year it is. We do this by finding the total number of days in all the whole months and then adding the number of days in the current month.

   • So, if the date is the 13th of March, find the total number of days in January and February:

     31 + 28 = 59

   • Find the total number of extra days in March and add them to the total above:

     59 + 13 = 72

3. Subtract the answer above from the total number of days in the year:

   365 - 72 = 293

That's it. You just calculated the number of days left in the year.

Our day of the year calculator takes in one input only — a date. You are allowed to pick a date from the calendar icon, and our day of the year calculator automatically calculates what numbered day of the year it is and how many days there are left in the year from that date.

Additionally, our days left in the year calculator is set to automatically generate the day of the year that today corresponds to and how many days are left in the current year.

To calculate what day of the year it is today, follow these steps:

1. Get the numbered day in the current month.
2. Get the number of days for each whole month that has passed.
3. Find the total of the days that you found in Step 2.
4. Add the extra days for the current month you found in Step 1 to the answer found in Step 3.

That's it. You just calculated what day of the year it is out of 365.

The 16th of March 1977 was the 75th day of the year. It was not a leap year since the year cannot be divided by 4 without leaving a remainder. To calculate the numbered day, follow these steps:

1. Write down the numbered day of March: 16.

2. Write down the number of days for each month preceding March: 31 and 28.

3. Add the numbers from 1 and 2 together:

   16 + 31 + 28 = 75

As you can see, it was the 75th day of the year.

In a non-leap year, some people born on the 29th celebrate their birthdays on the 28th of February, while others celebrate on the 1st of March.

Here is one sure thing, if you were born on the 29th of February, you were born on the 60th day of the year and the day after the 28th. So whether you celebrate on the 28th or the 1st, you complete a full year on the day after the 28th, even in non-leap years.