Week Number Calculator

Calendar weeks 2023 - CW 2023

Thema Week Numbers ﹣ Calendar weeks 2023

The following table shows all ISO calendar weeks 2023 from 1 to 53, with their start date beginning on Monday and their end date falling on Sunday.

European and Asian ISO calendar weeks 2023 - CW 2023
CWStart of the CWEnd of the CW ISO-Name
CW 1Monday, January 2, 2023Sunday, January 8, 20232023‑W01
CW 2Monday, January 9, 2023Sunday, January 15, 20232023‑W02
CW 3Monday, January 16, 2023Sunday, January 22, 20232023‑W03
CW 4Monday, January 23, 2023Sunday, January 29, 20232023‑W04
CW 5Monday, January 30, 2023Sunday, February 5, 20232023‑W05
CW 6Monday, February 6, 2023Sunday, February 12, 20232023‑W06
CW 7Monday, February 13, 2023Sunday, February 19, 20232023‑W07
CW 8Monday, February 20, 2023Sunday, February 26, 20232023‑W08
CW 9Monday, February 27, 2023Sunday, March 5, 20232023‑W09
CW 10Monday, March 6, 2023Sunday, March 12, 20232023‑W10
CW 11Monday, March 13, 2023Sunday, March 19, 20232023‑W11
CW 12Monday, March 20, 2023Sunday, March 26, 20232023‑W12
CW 13Monday, March 27, 2023Sunday, April 2, 20232023‑W13
CW 14Monday, April 3, 2023Sunday, April 9, 20232023‑W14
CW 15Monday, April 10, 2023Sunday, April 16, 20232023‑W15
CW 16Monday, April 17, 2023Sunday, April 23, 20232023‑W16
CW 17Monday, April 24, 2023Sunday, April 30, 20232023‑W17
CW 18Monday, May 1, 2023Sunday, May 7, 20232023‑W18
CW 19Monday, May 8, 2023Sunday, May 14, 20232023‑W19
CW 20Monday, May 15, 2023Sunday, May 21, 20232023‑W20
CW 21Monday, May 22, 2023Sunday, May 28, 20232023‑W21
CW 22Monday, May 29, 2023Sunday, June 4, 20232023‑W22
CW 23Monday, June 5, 2023Sunday, June 11, 20232023‑W23
CW 24Monday, June 12, 2023Sunday, June 18, 20232023‑W24
CW 25Monday, June 19, 2023Sunday, June 25, 20232023‑W25
CW 26Monday, June 26, 2023Sunday, July 2, 20232023‑W26
CW 27Monday, July 3, 2023Sunday, July 9, 20232023‑W27
CW 28Monday, July 10, 2023Sunday, July 16, 20232023‑W28
CW 29Monday, July 17, 2023Sunday, July 23, 20232023‑W29
CW 30Monday, July 24, 2023Sunday, July 30, 20232023‑W30
CW 31Monday, July 31, 2023Sunday, August 6, 20232023‑W31
CW 32Monday, August 7, 2023Sunday, August 13, 20232023‑W32
CW 33Monday, August 14, 2023Sunday, August 20, 20232023‑W33
CW 34Monday, August 21, 2023Sunday, August 27, 20232023‑W34
CW 35Monday, August 28, 2023Sunday, September 3, 20232023‑W35
CW 36Monday, September 4, 2023Sunday, September 10, 20232023‑W36
CW 37Monday, September 11, 2023Sunday, September 17, 20232023‑W37
CW 38Monday, September 18, 2023Sunday, September 24, 20232023‑W38
CW 39Monday, September 25, 2023Sunday, October 1, 20232023‑W39
CW 40Monday, October 2, 2023Sunday, October 8, 20232023‑W40
CW 41Monday, October 9, 2023Sunday, October 15, 20232023‑W41
CW 42Monday, October 16, 2023Sunday, October 22, 20232023‑W42
CW 43Monday, October 23, 2023Sunday, October 29, 20232023‑W43
CW 44Monday, October 30, 2023Sunday, November 5, 20232023‑W44
CW 45Monday, November 6, 2023Sunday, November 12, 20232023‑W45
CW 46Monday, November 13, 2023Sunday, November 19, 20232023‑W46
CW 47Monday, November 20, 2023Sunday, November 26, 20232023‑W47
CW 48Monday, November 27, 2023Sunday, December 3, 20232023‑W48
CW 49Monday, December 4, 2023Sunday, December 10, 20232023‑W49
CW 50Monday, December 11, 2023Sunday, December 17, 20232023‑W50
CW 51Monday, December 18, 2023Sunday, December 24, 20232023‑W51
CW 52Monday, December 25, 2023Sunday, December 31, 20232023‑W52
CW 532023 does not exist week 532023 has only 52 calendar weeks2023‑W53

The ISO calendar weeks for 2023 are defined according to the international ISO standard. That is, each calendar week starts on Monday and ends on Sunday. Even during the change of year, a new calendar week starts on Monday and ends on Sunday. The ISO standard specifies that the majority of the first calendar week (i.e., at least four days) must lie in the new year.

Table of all American calendar weeks for 2023

The following table shows all "American" calendar weeks 2023, with their start date beginning on Sunday and their end date falling on Saturday.

American calendar weeks 2023 - CW 2023
CWStart of the CWEnd of the CW
1Sunday, January 1, 2023Saturday, January 7, 2023
2Sunday, January 8, 2023Saturday, January 14, 2023
3Sunday, January 15, 2023Saturday, January 21, 2023
4Sunday, January 22, 2023Saturday, January 28, 2023
5Sunday, January 29, 2023Saturday, February 4, 2023
6Sunday, February 5, 2023Saturday, February 11, 2023
7Sunday, February 12, 2023Saturday, February 18, 2023
8Sunday, February 19, 2023Saturday, February 25, 2023
9Sunday, February 26, 2023Saturday, March 4, 2023
10Sunday, March 5, 2023Saturday, March 11, 2023
11Sunday, March 12, 2023Saturday, March 18, 2023
12Sunday, March 19, 2023Saturday, March 25, 2023
13Sunday, March 26, 2023Saturday, April 1, 2023
14Sunday, April 2, 2023Saturday, April 8, 2023
15Sunday, April 9, 2023Saturday, April 15, 2023
16Sunday, April 16, 2023Saturday, April 22, 2023
17Sunday, April 23, 2023Saturday, April 29, 2023
18Sunday, April 30, 2023Saturday, May 6, 2023
19Sunday, May 7, 2023Saturday, May 13, 2023
20Sunday, May 14, 2023Saturday, May 20, 2023
21Sunday, May 21, 2023Saturday, May 27, 2023
22Sunday, May 28, 2023Saturday, June 3, 2023
23Sunday, June 4, 2023Saturday, June 10, 2023
24Sunday, June 11, 2023Saturday, June 17, 2023
25Sunday, June 18, 2023Saturday, June 24, 2023
26Sunday, June 25, 2023Saturday, July 1, 2023
27Sunday, July 2, 2023Saturday, July 8, 2023
28Sunday, July 9, 2023Saturday, July 15, 2023
29Sunday, July 16, 2023Saturday, July 22, 2023
30Sunday, July 23, 2023Saturday, July 29, 2023
31Sunday, July 30, 2023Saturday, August 5, 2023
32Sunday, August 6, 2023Saturday, August 12, 2023
33Sunday, August 13, 2023Saturday, August 19, 2023
34Sunday, August 20, 2023Saturday, August 26, 2023
35Sunday, August 27, 2023Saturday, September 2, 2023
36Sunday, September 3, 2023Saturday, September 9, 2023
37Sunday, September 10, 2023Saturday, September 16, 2023
38Sunday, September 17, 2023Saturday, September 23, 2023
39Sunday, September 24, 2023Saturday, September 30, 2023
40Sunday, October 1, 2023Saturday, October 7, 2023
41Sunday, October 8, 2023Saturday, October 14, 2023
42Sunday, October 15, 2023Saturday, October 21, 2023
43Sunday, October 22, 2023Saturday, October 28, 2023
44Sunday, October 29, 2023Saturday, November 4, 2023
45Sunday, November 5, 2023Saturday, November 11, 2023
46Sunday, November 12, 2023Saturday, November 18, 2023
47Sunday, November 19, 2023Saturday, November 25, 2023
48Sunday, November 26, 2023Saturday, December 2, 2023
49Sunday, December 3, 2023Saturday, December 9, 2023
50Sunday, December 10, 2023Saturday, December 16, 2023
51Sunday, December 17, 2023Saturday, December 23, 2023
52Sunday, December 24, 2023Saturday, December 30, 2023
53Sunday, December 31, 2023Sunday, December 31, 2023

The "American" calendar weeks for 2023 are used in the USA, Canada and most Latin American countries, Australia, Japan, Israel, South Korea and others. Unlike the otherwise internationally standardised ISO weeks, the American calendar weeks start on Sundays instead of Mondays and end on Saturdays. However, the first calendar week always begins on the 1st of January and the last always ends on the 31st of December. These two weeks can have fewer than seven days. There are always 53 calendar weeks, except in a leap year where 31st December is a Sunday. As a result, such a year will have 54 calendar weeks.

Calculation of any calendar weeks 2023

Source information

As source for the information in the "Week Numbers" category, we have used in particular:

Last update on July 2, 2022

The pages of the "Week Numbers" category were last editorially reviewed by Michael Mühl on July 2, 2022. They all correspond to the current status.

Previous changes on June 25, 2021