Week Number Calculator

All calendar weeks 2020 - CW 2020

Thema Week Numbers ﹣ Calendar weeks 2020

The calendar year 2020 begins on Wednesday, January 1, 2020 and ends on Thursday, December 31, 2020.

Table of all European and Asian ISO calendar weeks for 2020

The following table shows all ISO calendar weeks 2020 from 1 to 53, with their start date beginning on Monday and their end date falling on Sunday.

European and Asian ISO calendar weeks 2020 - CW 2020
CWStart of the CWEnd of the CWISO-Name
1Monday, December 30, 2019Sunday, January 5, 20202020‑W01
2Monday, January 6, 2020Sunday, January 12, 20202020‑W02
3Monday, January 13, 2020Sunday, January 19, 20202020‑W03
4Monday, January 20, 2020Sunday, January 26, 20202020‑W04
5Monday, January 27, 2020Sunday, February 2, 20202020‑W05
6Monday, February 3, 2020Sunday, February 9, 20202020‑W06
7Monday, February 10, 2020Sunday, February 16, 20202020‑W07
8Monday, February 17, 2020Sunday, February 23, 20202020‑W08
9Monday, February 24, 2020Sunday, March 1, 20202020‑W09
10Monday, March 2, 2020Sunday, March 8, 20202020‑W10
11Monday, March 9, 2020Sunday, March 15, 20202020‑W11
12Monday, March 16, 2020Sunday, March 22, 20202020‑W12
13Monday, March 23, 2020Sunday, March 29, 20202020‑W13
14Monday, March 30, 2020Sunday, April 5, 20202020‑W14
15Monday, April 6, 2020Sunday, April 12, 20202020‑W15
16Monday, April 13, 2020Sunday, April 19, 20202020‑W16
17Monday, April 20, 2020Sunday, April 26, 20202020‑W17
18Monday, April 27, 2020Sunday, May 3, 20202020‑W18
19Monday, May 4, 2020Sunday, May 10, 20202020‑W19
20Monday, May 11, 2020Sunday, May 17, 20202020‑W20
21Monday, May 18, 2020Sunday, May 24, 20202020‑W21
22Monday, May 25, 2020Sunday, May 31, 20202020‑W22
23Monday, June 1, 2020Sunday, June 7, 20202020‑W23
24Monday, June 8, 2020Sunday, June 14, 20202020‑W24
25Monday, June 15, 2020Sunday, June 21, 20202020‑W25
26Monday, June 22, 2020Sunday, June 28, 20202020‑W26
27Monday, June 29, 2020Sunday, July 5, 20202020‑W27
28Monday, July 6, 2020Sunday, July 12, 20202020‑W28
29Monday, July 13, 2020Sunday, July 19, 20202020‑W29
30Monday, July 20, 2020Sunday, July 26, 20202020‑W30
31Monday, July 27, 2020Sunday, August 2, 20202020‑W31
32Monday, August 3, 2020Sunday, August 9, 20202020‑W32
33Monday, August 10, 2020Sunday, August 16, 20202020‑W33
34Monday, August 17, 2020Sunday, August 23, 20202020‑W34
35Monday, August 24, 2020Sunday, August 30, 20202020‑W35
36Monday, August 31, 2020Sunday, September 6, 20202020‑W36
37Monday, September 7, 2020Sunday, September 13, 20202020‑W37
38Monday, September 14, 2020Sunday, September 20, 20202020‑W38
39Monday, September 21, 2020Sunday, September 27, 20202020‑W39
40Monday, September 28, 2020Sunday, October 4, 20202020‑W40
41Monday, October 5, 2020Sunday, October 11, 20202020‑W41
42Monday, October 12, 2020Sunday, October 18, 20202020‑W42
43Monday, October 19, 2020Sunday, October 25, 20202020‑W43
44Monday, October 26, 2020Sunday, November 1, 20202020‑W44
45Monday, November 2, 2020Sunday, November 8, 20202020‑W45
46Monday, November 9, 2020Sunday, November 15, 20202020‑W46
47Monday, November 16, 2020Sunday, November 22, 20202020‑W47
48Monday, November 23, 2020Sunday, November 29, 20202020‑W48
49Monday, November 30, 2020Sunday, December 6, 20202020‑W49
50Monday, December 7, 2020Sunday, December 13, 20202020‑W50
51Monday, December 14, 2020Sunday, December 20, 20202020‑W51
52Monday, December 21, 2020Sunday, December 27, 20202020‑W52
53Monday, December 28, 2020Sunday, January 3, 20212020‑W53

The ISO calendar weeks for 2020 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 2020

The following table shows all "American" calendar weeks 2020, with their start date beginning on Sunday and their end date falling on Saturday.

American calendar weeks 2020 - CW 2020
CWStart of the CWEnd of the CW
1Wednesday, January 1, 2020Saturday, January 4, 2020
2Sunday, January 5, 2020Saturday, January 11, 2020
3Sunday, January 12, 2020Saturday, January 18, 2020
4Sunday, January 19, 2020Saturday, January 25, 2020
5Sunday, January 26, 2020Saturday, February 1, 2020
6Sunday, February 2, 2020Saturday, February 8, 2020
7Sunday, February 9, 2020Saturday, February 15, 2020
8Sunday, February 16, 2020Saturday, February 22, 2020
9Sunday, February 23, 2020Saturday, February 29, 2020
10Sunday, March 1, 2020Saturday, March 7, 2020
11Sunday, March 8, 2020Saturday, March 14, 2020
12Sunday, March 15, 2020Saturday, March 21, 2020
13Sunday, March 22, 2020Saturday, March 28, 2020
14Sunday, March 29, 2020Saturday, April 4, 2020
15Sunday, April 5, 2020Saturday, April 11, 2020
16Sunday, April 12, 2020Saturday, April 18, 2020
17Sunday, April 19, 2020Saturday, April 25, 2020
18Sunday, April 26, 2020Saturday, May 2, 2020
19Sunday, May 3, 2020Saturday, May 9, 2020
20Sunday, May 10, 2020Saturday, May 16, 2020
21Sunday, May 17, 2020Saturday, May 23, 2020
22Sunday, May 24, 2020Saturday, May 30, 2020
23Sunday, May 31, 2020Saturday, June 6, 2020
24Sunday, June 7, 2020Saturday, June 13, 2020
25Sunday, June 14, 2020Saturday, June 20, 2020
26Sunday, June 21, 2020Saturday, June 27, 2020
27Sunday, June 28, 2020Saturday, July 4, 2020
28Sunday, July 5, 2020Saturday, July 11, 2020
29Sunday, July 12, 2020Saturday, July 18, 2020
30Sunday, July 19, 2020Saturday, July 25, 2020
31Sunday, July 26, 2020Saturday, August 1, 2020
32Sunday, August 2, 2020Saturday, August 8, 2020
33Sunday, August 9, 2020Saturday, August 15, 2020
34Sunday, August 16, 2020Saturday, August 22, 2020
35Sunday, August 23, 2020Saturday, August 29, 2020
36Sunday, August 30, 2020Saturday, September 5, 2020
37Sunday, September 6, 2020Saturday, September 12, 2020
38Sunday, September 13, 2020Saturday, September 19, 2020
39Sunday, September 20, 2020Saturday, September 26, 2020
40Sunday, September 27, 2020Saturday, October 3, 2020
41Sunday, October 4, 2020Saturday, October 10, 2020
42Sunday, October 11, 2020Saturday, October 17, 2020
43Sunday, October 18, 2020Saturday, October 24, 2020
44Sunday, October 25, 2020Saturday, October 31, 2020
45Sunday, November 1, 2020Saturday, November 7, 2020
46Sunday, November 8, 2020Saturday, November 14, 2020
47Sunday, November 15, 2020Saturday, November 21, 2020
48Sunday, November 22, 2020Saturday, November 28, 2020
49Sunday, November 29, 2020Saturday, December 5, 2020
50Sunday, December 6, 2020Saturday, December 12, 2020
51Sunday, December 13, 2020Saturday, December 19, 2020
52Sunday, December 20, 2020Saturday, December 26, 2020
53Sunday, December 27, 2020Thursday, December 31, 2020

The "American" calendar weeks for 2020 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 2020

Source information

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

Last update on January 24, 2022

The pages of the "Week Numbers" category were last editorially reviewed by Michael Mühl on January 24, 2022. They all correspond to the current status.

Previous changes on June 25, 2021