Day of the Year Calculator

Find which numbered day of the year a date is. Enter a date and the calculator shows its ordinal day from 1 to 365 or 366, the days remaining in the year, and how far through the year the date sits as a percentage. Free and instant in your browser.

  • Leap-year accurate
  • 100% free
  • No sign-up, no app
  • Instant as you type
  • Works offline after first load
Read the guide: What Day of the Year Is It
Day of the year
Day 167 of 365
Tuesday, 16 June 2026.
Day number
167
Days left in year
198
Year is
45.8% gone

How to use it

  1. 1

    Pick a date

    Choose any date, or leave it on today.

  2. 2

    Read the day number

    See the ordinal day of the year, where 1 January is day 1.

  3. 3

    See the remainder

    Check how many days are left in the year and the percentage that has passed.

When it comes in handy

Logs and filenames

Use the ordinal day number, sometimes called the Julian day, in records and file names.

Progress through the year

See how far through the year a date sits, handy for goals and reviews.

Planning and counting

Know how many days are left in the year from a given date.

Instant, accurate & 100% in your browser

The calculation runs right here in your browser, counting the real calendar so leap years and month lengths come out right. Nothing you type is sent to a server, there is no sign-up and no limit, and once the page has loaded it keeps working even with no connection.

Frequently asked questions

What is the day of the year?
It is the ordinal position of a date within its year, counting 1 January as day 1. So 1 February is day 32, and 31 December is day 365 in a common year or 366 in a leap year. This number is sometimes called the ordinal date or, loosely, the Julian day.
How does a leap year change the day number?
Up to and including 28 February the day numbers are the same in any year. From 1 March onward, a leap year shifts every later date up by one because of the extra 29 February. The calculator accounts for this, so the figure is correct for both common and leap years.
What is today's day of the year?
Leave the date on today and the calculator shows the current ordinal day, the days left in the year, and the percentage of the year that has passed. The figures update if you open it on a different day.
How accurate is the calculation?
The maths is done day by day using the real calendar, so leap years, the different lengths of months, and year boundaries are all handled correctly rather than approximated. There is no "30-day month" rounding, which is where many quick estimates go wrong, so the result matches what you would get counting on a calendar.

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