Week numbers 2023

Week 1 of 2023 runs from Monday, January 2 to Sunday, January 8; the last week, week 52, runs from Monday, December 25 to Sunday, December 31.

All week numbers of 2023 with the start and end date of each week.

Week numbers 2023 (ISO-8601)
WeekStart dateEnd date
52Sunday, January 1, 2023Sunday, January 1, 2023
1Monday, January 2, 2023Sunday, January 8, 2023
2Monday, January 9, 2023Sunday, January 15, 2023
3Monday, January 16, 2023Sunday, January 22, 2023
4Monday, January 23, 2023Sunday, January 29, 2023
5Monday, January 30, 2023Sunday, February 5, 2023
6Monday, February 6, 2023Sunday, February 12, 2023
7Monday, February 13, 2023Sunday, February 19, 2023
8Monday, February 20, 2023Sunday, February 26, 2023
9Monday, February 27, 2023Sunday, March 5, 2023
10Monday, March 6, 2023Sunday, March 12, 2023
11Monday, March 13, 2023Sunday, March 19, 2023
12Monday, March 20, 2023Sunday, March 26, 2023
13Monday, March 27, 2023Sunday, April 2, 2023
14Monday, April 3, 2023Sunday, April 9, 2023
15Monday, April 10, 2023Sunday, April 16, 2023
16Monday, April 17, 2023Sunday, April 23, 2023
17Monday, April 24, 2023Sunday, April 30, 2023
18Monday, May 1, 2023Sunday, May 7, 2023
19Monday, May 8, 2023Sunday, May 14, 2023
20Monday, May 15, 2023Sunday, May 21, 2023
21Monday, May 22, 2023Sunday, May 28, 2023
22Monday, May 29, 2023Sunday, June 4, 2023
23Monday, June 5, 2023Sunday, June 11, 2023
24Monday, June 12, 2023Sunday, June 18, 2023
25Monday, June 19, 2023Sunday, June 25, 2023
26Monday, June 26, 2023Sunday, July 2, 2023
27Monday, July 3, 2023Sunday, July 9, 2023
28Monday, July 10, 2023Sunday, July 16, 2023
29Monday, July 17, 2023Sunday, July 23, 2023
30Monday, July 24, 2023Sunday, July 30, 2023
31Monday, July 31, 2023Sunday, August 6, 2023
32Monday, August 7, 2023Sunday, August 13, 2023
33Monday, August 14, 2023Sunday, August 20, 2023
34Monday, August 21, 2023Sunday, August 27, 2023
35Monday, August 28, 2023Sunday, September 3, 2023
36Monday, September 4, 2023Sunday, September 10, 2023
37Monday, September 11, 2023Sunday, September 17, 2023
38Monday, September 18, 2023Sunday, September 24, 2023
39Monday, September 25, 2023Sunday, October 1, 2023
40Monday, October 2, 2023Sunday, October 8, 2023
41Monday, October 9, 2023Sunday, October 15, 2023
42Monday, October 16, 2023Sunday, October 22, 2023
43Monday, October 23, 2023Sunday, October 29, 2023
44Monday, October 30, 2023Sunday, November 5, 2023
45Monday, November 6, 2023Sunday, November 12, 2023
46Monday, November 13, 2023Sunday, November 19, 2023
47Monday, November 20, 2023Sunday, November 26, 2023
48Monday, November 27, 2023Sunday, December 3, 2023
49Monday, December 4, 2023Sunday, December 10, 2023
50Monday, December 11, 2023Sunday, December 17, 2023
51Monday, December 18, 2023Sunday, December 24, 2023
52Monday, December 25, 2023Sunday, December 31, 2023

Week numbers according to the international standard. Source: ISO 8601. More about our sources

The US count (weeks start on Sunday, week 1 contains 1 January) is a common convention without an official standard.

US week numbers 2023

In the United States weeks start on Sunday and week 1 is the week containing January 1 (as in Excel WEEKNUM and Outlook).

US week numbers 2023 (Sunday to Saturday)
WeekStart dateEnd date
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