All calendar weeks 2018 - CW 2018

Updated on by Michael Mühl

The calendar year 2018 begins on Monday, January  1, 2018 and ends on Monday, December 31, 2018.

Table of all European and Asian ISO calendar weeks for 2018

The following table shows all ISO calendar weeks 2018 from 1 to 53 with their start date beginning on Monday and their end date falling on Sunday.

European and Asian ISO calendar weeks 2018 - CW 2018
CWStart of the CWEnd of the CWISO-Name
1Monday, January  1, 2018Sunday, January  7, 20182018‑W01
2Monday, January  8, 2018Sunday, January 14, 20182018‑W02
3Monday, January 15, 2018Sunday, January 21, 20182018‑W03
4Monday, January 22, 2018Sunday, January 28, 20182018‑W04
5Monday, January 29, 2018Sunday, February  4, 20182018‑W05
6Monday, February  5, 2018Sunday, February 11, 20182018‑W06
7Monday, February 12, 2018Sunday, February 18, 20182018‑W07
8Monday, February 19, 2018Sunday, February 25, 20182018‑W08
9Monday, February 26, 2018Sunday, March  4, 20182018‑W09
10Monday, March  5, 2018Sunday, March 11, 20182018‑W10
11Monday, March 12, 2018Sunday, March 18, 20182018‑W11
12Monday, March 19, 2018Sunday, March 25, 20182018‑W12
13Monday, March 26, 2018Sunday, April  1, 20182018‑W13
14Monday, April  2, 2018Sunday, April  8, 20182018‑W14
15Monday, April  9, 2018Sunday, April 15, 20182018‑W15
16Monday, April 16, 2018Sunday, April 22, 20182018‑W16
17Monday, April 23, 2018Sunday, April 29, 20182018‑W17
18Monday, April 30, 2018Sunday, May  6, 20182018‑W18
19Monday, May  7, 2018Sunday, May 13, 20182018‑W19
20Monday, May 14, 2018Sunday, May 20, 20182018‑W20
21Monday, May 21, 2018Sunday, May 27, 20182018‑W21
22Monday, May 28, 2018Sunday, June  3, 20182018‑W22
23Monday, June  4, 2018Sunday, June 10, 20182018‑W23
24Monday, June 11, 2018Sunday, June 17, 20182018‑W24
25Monday, June 18, 2018Sunday, June 24, 20182018‑W25
26Monday, June 25, 2018Sunday, July  1, 20182018‑W26
27Monday, July  2, 2018Sunday, July  8, 20182018‑W27
28Monday, July  9, 2018Sunday, July 15, 20182018‑W28
29Monday, July 16, 2018Sunday, July 22, 20182018‑W29
30Monday, July 23, 2018Sunday, July 29, 20182018‑W30
31Monday, July 30, 2018Sunday, August  5, 20182018‑W31
32Monday, August  6, 2018Sunday, August 12, 20182018‑W32
33Monday, August 13, 2018Sunday, August 19, 20182018‑W33
34Monday, August 20, 2018Sunday, August 26, 20182018‑W34
35Monday, August 27, 2018Sunday, September  2, 20182018‑W35
36Monday, September  3, 2018Sunday, September  9, 20182018‑W36
37Monday, September 10, 2018Sunday, September 16, 20182018‑W37
38Monday, September 17, 2018Sunday, September 23, 20182018‑W38
39Monday, September 24, 2018Sunday, September 30, 20182018‑W39
40Monday, October  1, 2018Sunday, October  7, 20182018‑W40
41Monday, October  8, 2018Sunday, October 14, 20182018‑W41
42Monday, October 15, 2018Sunday, October 21, 20182018‑W42
43Monday, October 22, 2018Sunday, October 28, 20182018‑W43
44Monday, October 29, 2018Sunday, November  4, 20182018‑W44
45Monday, November  5, 2018Sunday, November 11, 20182018‑W45
46Monday, November 12, 2018Sunday, November 18, 20182018‑W46
47Monday, November 19, 2018Sunday, November 25, 20182018‑W47
48Monday, November 26, 2018Sunday, December  2, 20182018‑W48
49Monday, December  3, 2018Sunday, December  9, 20182018‑W49
50Monday, December 10, 2018Sunday, December 16, 20182018‑W50
51Monday, December 17, 2018Sunday, December 23, 20182018‑W51
52Monday, December 24, 2018Sunday, December 30, 20182018‑W52
532018 does not exist week 532018 has only 52 calendar weeks2018‑W53

The ISO calendar weeks for 2018 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 2018

The following table shows all "American" calendar weeks 2018 with their start date beginning on Sunday and their end date falling on Saturday.

American calendar weeks 2018 - CW 2018
CWStart of the CWEnd of the CW
1Monday, January  1, 2018Saturday, January  6, 2018
2Sunday, January  7, 2018Saturday, January 13, 2018
3Sunday, January 14, 2018Saturday, January 20, 2018
4Sunday, January 21, 2018Saturday, January 27, 2018
5Sunday, January 28, 2018Saturday, February  3, 2018
6Sunday, February  4, 2018Saturday, February 10, 2018
7Sunday, February 11, 2018Saturday, February 17, 2018
8Sunday, February 18, 2018Saturday, February 24, 2018
9Sunday, February 25, 2018Saturday, March  3, 2018
10Sunday, March  4, 2018Saturday, March 10, 2018
11Sunday, March 11, 2018Saturday, March 17, 2018
12Sunday, March 18, 2018Saturday, March 24, 2018
13Sunday, March 25, 2018Saturday, March 31, 2018
14Sunday, April  1, 2018Saturday, April  7, 2018
15Sunday, April  8, 2018Saturday, April 14, 2018
16Sunday, April 15, 2018Saturday, April 21, 2018
17Sunday, April 22, 2018Saturday, April 28, 2018
18Sunday, April 29, 2018Saturday, May  5, 2018
19Sunday, May  6, 2018Saturday, May 12, 2018
20Sunday, May 13, 2018Saturday, May 19, 2018
21Sunday, May 20, 2018Saturday, May 26, 2018
22Sunday, May 27, 2018Saturday, June  2, 2018
23Sunday, June  3, 2018Saturday, June  9, 2018
24Sunday, June 10, 2018Saturday, June 16, 2018
25Sunday, June 17, 2018Saturday, June 23, 2018
26Sunday, June 24, 2018Saturday, June 30, 2018
27Sunday, July  1, 2018Saturday, July  7, 2018
28Sunday, July  8, 2018Saturday, July 14, 2018
29Sunday, July 15, 2018Saturday, July 21, 2018
30Sunday, July 22, 2018Saturday, July 28, 2018
31Sunday, July 29, 2018Saturday, August  4, 2018
32Sunday, August  5, 2018Saturday, August 11, 2018
33Sunday, August 12, 2018Saturday, August 18, 2018
34Sunday, August 19, 2018Saturday, August 25, 2018
35Sunday, August 26, 2018Saturday, September  1, 2018
36Sunday, September  2, 2018Saturday, September  8, 2018
37Sunday, September  9, 2018Saturday, September 15, 2018
38Sunday, September 16, 2018Saturday, September 22, 2018
39Sunday, September 23, 2018Saturday, September 29, 2018
40Sunday, September 30, 2018Saturday, October  6, 2018
41Sunday, October  7, 2018Saturday, October 13, 2018
42Sunday, October 14, 2018Saturday, October 20, 2018
43Sunday, October 21, 2018Saturday, October 27, 2018
44Sunday, October 28, 2018Saturday, November  3, 2018
45Sunday, November  4, 2018Saturday, November 10, 2018
46Sunday, November 11, 2018Saturday, November 17, 2018
47Sunday, November 18, 2018Saturday, November 24, 2018
48Sunday, November 25, 2018Saturday, December  1, 2018
49Sunday, December  2, 2018Saturday, December  8, 2018
50Sunday, December  9, 2018Saturday, December 15, 2018
51Sunday, December 16, 2018Saturday, December 22, 2018
52Sunday, December 23, 2018Saturday, December 29, 2018
53Sunday, December 30, 2018Monday, December 31, 2018

The "American" calendar weeks for 2018 are used in the USA, Canada and most Latin American countries, Australia as well as in 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 first of January and the last always ends on 31 December. These two weeks can have fewer than seven days. There are always 53 calendar weeks except in a leap year when 31 December is a Sunday. Such a year then has 54 calendar weeks.

Calculation of any calendar weeks 2018

Source information

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

Last update on June 19, 2021

The pages of the "Week Numbers" category were last editorially reviewed by Michael Mühl on June 19, 2021. They all correspond to the current status.

Previous changes on June 25, 2020