What Day of the Year Is It? — Day Number

The day of year counts from 1 on 1 January to 365 — or 366 in a leap year — on 31 December. The bar above shows how much of the year has actually elapsed, which is a more honest progress figure than the day number alone because it includes the time of day.

Ordinal dates and Julian days

ISO 8601 writes an ordinal date as 2026-212. Astronomers use a different and much larger figure, the Julian day number, counted continuously from 4713 BC — a genuinely different thing that shares a confusingly similar name. Both are explained in day of year and Julian day.

Guides about Day of Year

Calendar facts Day Of Year And Julian Day Number Explained Every date has a plain ordinal number between 1 and 366. Here is how the day of year is calculated, how 29 February shifts it, and how it differs from a Julian day. 5 min read

More datetoday.now pages

Today's Date The date today in full, with the day of year, ISO week, quarter and days left in the year. Tomorrow's Date Tomorrow's date with the same figures — weekday, ISO form, day of year and week. Week Number The current ISO week number, and the week number for any date you choose. Date Calculator Add or subtract days, weeks, months, years or business days — and count the days between two dates.

Frequently asked questions

What day of the year is it?

The number is shown above, out of 365 or 366 depending on whether this is a leap year.

How many days are in this year?

365 in a common year and 366 in a leap year. The page shows which applies and how many days remain.

Is day of year the same as a Julian date?

No. Day of year is 1 to 366 within a single year, while a Julian day number is a continuous count running into the millions.