Home→Day of the Year
Last verified October 26, 2026 · How we verify

What day of the year is it?

Today's day number, the week number in both systems (ISO and U.S./Excel), the Julian date, and the days and working days left in the year. Pick any date to check another. Need the date itself in another format? See today's date in every format.

Uses your device's date. Working days skip weekends and federal holidays.

Which week number?

How many days until New Year? →

The day of the year counts from 1 on January 1 to 365 on December 31 (366 in a leap year). Written after a two-digit year, it is the everyday Julian date (YYDDD): October 27, 2026 is day 300, or 26300. Week numbers come in two systems: ISO 8601 (Monday start) and the U.S. system used by Excel's WEEKNUM (Sunday start).

Week numbers explained

Microsoft's Excel documentation describes the two systems:

“System 1: The week containing January 1 is the first week of the year, and is numbered week 1.” “System 2: The week containing the first Thursday of the year is the first week of the year, and is numbered as week 1. This system is the methodology specified in ISO 8601, which is commonly known as the European week numbering system.”— Microsoft Support, WEEKNUM function

Excel's =WEEKNUM(date) uses System 1 with weeks starting on Sunday unless you pass a second argument; =WEEKNUM(date,21) and =ISOWEEKNUM(date) give the ISO week. Under ISO rules, the first days of January can belong to the last week of the previous year, and the last days of December to week 1 of the next.

Week numbers 2026

2026 has 53 ISO weeks. In the U.S. (Excel WEEKNUM) system its first and last weeks are partial, and December 31 falls in week 53.

WeekISO 8601 (Monday–Sunday)U.S. / Excel WEEKNUM (Sunday–Saturday)
1Dec 29, 2025 – Jan 4Jan 1 – Jan 3
2Jan 5 – Jan 11Jan 4 – Jan 10
3Jan 12 – Jan 18Jan 11 – Jan 17
4Jan 19 – Jan 25Jan 18 – Jan 24
5Jan 26 – Feb 1Jan 25 – Jan 31
6Feb 2 – Feb 8Feb 1 – Feb 7
7Feb 9 – Feb 15Feb 8 – Feb 14
8Feb 16 – Feb 22Feb 15 – Feb 21
9Feb 23 – Mar 1Feb 22 – Feb 28
10Mar 2 – Mar 8Mar 1 – Mar 7
11Mar 9 – Mar 15Mar 8 – Mar 14
12Mar 16 – Mar 22Mar 15 – Mar 21
13Mar 23 – Mar 29Mar 22 – Mar 28
14Mar 30 – Apr 5Mar 29 – Apr 4
15Apr 6 – Apr 12Apr 5 – Apr 11
16Apr 13 – Apr 19Apr 12 – Apr 18
17Apr 20 – Apr 26Apr 19 – Apr 25
18Apr 27 – May 3Apr 26 – May 2
19May 4 – May 10May 3 – May 9
20May 11 – May 17May 10 – May 16
21May 18 – May 24May 17 – May 23
22May 25 – May 31May 24 – May 30
23Jun 1 – Jun 7May 31 – Jun 6
24Jun 8 – Jun 14Jun 7 – Jun 13
25Jun 15 – Jun 21Jun 14 – Jun 20
26Jun 22 – Jun 28Jun 21 – Jun 27
27Jun 29 – Jul 5Jun 28 – Jul 4
28Jul 6 – Jul 12Jul 5 – Jul 11
29Jul 13 – Jul 19Jul 12 – Jul 18
30Jul 20 – Jul 26Jul 19 – Jul 25
31Jul 27 – Aug 2Jul 26 – Aug 1
32Aug 3 – Aug 9Aug 2 – Aug 8
33Aug 10 – Aug 16Aug 9 – Aug 15
34Aug 17 – Aug 23Aug 16 – Aug 22
35Aug 24 – Aug 30Aug 23 – Aug 29
36Aug 31 – Sep 6Aug 30 – Sep 5
37Sep 7 – Sep 13Sep 6 – Sep 12
38Sep 14 – Sep 20Sep 13 – Sep 19
39Sep 21 – Sep 27Sep 20 – Sep 26
40Sep 28 – Oct 4Sep 27 – Oct 3
41Oct 5 – Oct 11Oct 4 – Oct 10
42Oct 12 – Oct 18Oct 11 – Oct 17
43Oct 19 – Oct 25Oct 18 – Oct 24
44Oct 26 – Nov 1Oct 25 – Oct 31
45Nov 2 – Nov 8Nov 1 – Nov 7
46Nov 9 – Nov 15Nov 8 – Nov 14
47Nov 16 – Nov 22Nov 15 – Nov 21
48Nov 23 – Nov 29Nov 22 – Nov 28
49Nov 30 – Dec 6Nov 29 – Dec 5
50Dec 7 – Dec 13Dec 6 – Dec 12
51Dec 14 – Dec 20Dec 13 – Dec 19
52Dec 21 – Dec 27Dec 20 – Dec 26
53Dec 28 – Jan 3, 2027Dec 27 – Dec 31
Week numbers 2027

2027 has 52 ISO weeks; December 31 falls in U.S. week 53.

WeekISO 8601 (Monday–Sunday)U.S. / Excel WEEKNUM (Sunday–Saturday)
1Jan 4 – Jan 10Jan 1 – Jan 2
2Jan 11 – Jan 17Jan 3 – Jan 9
3Jan 18 – Jan 24Jan 10 – Jan 16
4Jan 25 – Jan 31Jan 17 – Jan 23
5Feb 1 – Feb 7Jan 24 – Jan 30
6Feb 8 – Feb 14Jan 31 – Feb 6
7Feb 15 – Feb 21Feb 7 – Feb 13
8Feb 22 – Feb 28Feb 14 – Feb 20
9Mar 1 – Mar 7Feb 21 – Feb 27
10Mar 8 – Mar 14Feb 28 – Mar 6
11Mar 15 – Mar 21Mar 7 – Mar 13
12Mar 22 – Mar 28Mar 14 – Mar 20
13Mar 29 – Apr 4Mar 21 – Mar 27
14Apr 5 – Apr 11Mar 28 – Apr 3
15Apr 12 – Apr 18Apr 4 – Apr 10
16Apr 19 – Apr 25Apr 11 – Apr 17
17Apr 26 – May 2Apr 18 – Apr 24
18May 3 – May 9Apr 25 – May 1
19May 10 – May 16May 2 – May 8
20May 17 – May 23May 9 – May 15
21May 24 – May 30May 16 – May 22
22May 31 – Jun 6May 23 – May 29
23Jun 7 – Jun 13May 30 – Jun 5
24Jun 14 – Jun 20Jun 6 – Jun 12
25Jun 21 – Jun 27Jun 13 – Jun 19
26Jun 28 – Jul 4Jun 20 – Jun 26
27Jul 5 – Jul 11Jun 27 – Jul 3
28Jul 12 – Jul 18Jul 4 – Jul 10
29Jul 19 – Jul 25Jul 11 – Jul 17
30Jul 26 – Aug 1Jul 18 – Jul 24
31Aug 2 – Aug 8Jul 25 – Jul 31
32Aug 9 – Aug 15Aug 1 – Aug 7
33Aug 16 – Aug 22Aug 8 – Aug 14
34Aug 23 – Aug 29Aug 15 – Aug 21
35Aug 30 – Sep 5Aug 22 – Aug 28
36Sep 6 – Sep 12Aug 29 – Sep 4
37Sep 13 – Sep 19Sep 5 – Sep 11
38Sep 20 – Sep 26Sep 12 – Sep 18
39Sep 27 – Oct 3Sep 19 – Sep 25
40Oct 4 – Oct 10Sep 26 – Oct 2
41Oct 11 – Oct 17Oct 3 – Oct 9
42Oct 18 – Oct 24Oct 10 – Oct 16
43Oct 25 – Oct 31Oct 17 – Oct 23
44Nov 1 – Nov 7Oct 24 – Oct 30
45Nov 8 – Nov 14Oct 31 – Nov 6
46Nov 15 – Nov 21Nov 7 – Nov 13
47Nov 22 – Nov 28Nov 14 – Nov 20
48Nov 29 – Dec 5Nov 21 – Nov 27
49Dec 6 – Dec 12Nov 28 – Dec 4
50Dec 13 – Dec 19Dec 5 – Dec 11
51Dec 20 – Dec 26Dec 12 – Dec 18
52Dec 27 – Jan 2, 2028Dec 19 – Dec 25
53—Dec 26 – Dec 31

Julian date: two meanings

Outside astronomy, "Julian date" is commonly used for the year plus the day of the year: YYDDD (26300) or YYYYDDD (2026300). It is an informal name for the ordinal date, and it is what the box above shows first. In astronomy, Julian Date means something different:

“Julian dates (abbreviated JD) are simply a continuous count of days and fractions since noon Universal Time on January 1, 4713 BC (on the Julian calendar).”— U.S. Naval Observatory, Julian Date Converter

The box shows that number too, at noon UT for the chosen day and live to five decimals for right now.

Day of the year table

Find the month in the top row and the day on the left. In a leap year (2028 is the next one), add 1 to every number from March 1 on, and February 29 is day 060.

DayJanFebMarAprMayJunJulAugSepOctNovDec
1001032060091121152182213244274305335
2002033061092122153183214245275306336
3003034062093123154184215246276307337
4004035063094124155185216247277308338
5005036064095125156186217248278309339
6006037065096126157187218249279310340
7007038066097127158188219250280311341
8008039067098128159189220251281312342
9009040068099129160190221252282313343
10010041069100130161191222253283314344
11011042070101131162192223254284315345
12012043071102132163193224255285316346
13013044072103133164194225256286317347
14014045073104134165195226257287318348
15015046074105135166196227258288319349
16016047075106136167197228259289320350
17017048076107137168198229260290321351
18018049077108138169199230261291322352
19019050078109139170200231262292323353
20020051079110140171201232263293324354
21021052080111141172202233264294325355
22022053081112142173203234265295326356
23023054082113143174204235266296327357
24024055083114144175205236267297328358
25025056084115145176206237268298329359
26026057085116146177207238269299330360
27027058086117147178208239270300331361
28028059087118148179209240271301332362
29029*088119149180210241272302333363
30030089120150181211242273303334364
31031090151212243304365
“The Julian calendar has a leap year every fourth year, while the Gregorian calendar has a leap year every fourth year except century years not exactly divisible by 400.”— U.S. Naval Observatory

In a spreadsheet

With a date in cell A1: day of the year =A1-DATE(YEAR(A1),1,0); Julian date YYDDD =TEXT(A1,"yy")&TEXT(A1-DATE(YEAR(A1),1,0),"000"); ISO week =ISOWEEKNUM(A1); U.S. week =WEEKNUM(A1). For days between two dates use the time between dates calculator, and for business days the working days calculator.

Questions, answered

Day and week numbers: common questions.

The box at the top of this page shows today's day number, from 1 on January 1 to 365 on December 31 (366 in a leap year), using your device's date.
In everyday use, a "Julian date" is the year and the day number written together, for example 26300 (YYDDD) for October 27, 2026, the 300th day of 2026. Astronomers mean something else by Julian Date: a continuous count of days since 4713 BC, which was 2,461,341 at noon UT on that same day. The box shows both.
It depends on the system. ISO 8601 weeks start on Monday, and week 1 is the week with the first Thursday of the year; this is what most of Europe and Excel's ISOWEEKNUM use. The U.S. system used by Excel's WEEKNUM by default starts weeks on Sunday, and week 1 is the week that contains January 1. The two numbers are often the same but can differ by one, especially near New Year.
2026 has 365 days: 52 weeks and 1 day. By ISO 8601 numbering it has 53 weeks; by Excel's WEEKNUM (Sunday start) its last day falls in week 53.
No. The next leap year is 2028. Under the Gregorian calendar a year is a leap year if it is divisible by 4, except century years not divisible by 400, so 2000 was a leap year and 2100 will not be.
With a date in A1: day of the year is =A1-DATE(YEAR(A1),1,0); the YYDDD Julian date is =TEXT(A1,"yy")&TEXT(A1-DATE(YEAR(A1),1,0),"000"); the ISO week is =ISOWEEKNUM(A1); and the Sunday-start U.S. week is =WEEKNUM(A1).
Sources

Where this comes from

The definitions were checked against the official sources below on October 26, 2026; the numbers are computed from them. How we verify.

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