What's the current Week Number?

Get current week number according to the ISO-8601 standard.

 
Current Week Number : 19

Week 19 start date is Monday, 03 May 2021 and end date is Sunday, 09 May 2021 as per ISO-8601 standard.

The ISO week-numbering year starts at the first day (Monday) of week 01 and ends at the Sunday before the new ISO year (hence without overlap or gap). It consists of 52 or 53 full weeks. The first ISO week of a year may have up to three days that are actually in the calendar year that is ending; if three, they are Monday, Tuesday and Wednesday. Similarly, the last ISO week of a year may have up to three days that are actually in the calendar year that is starting; if three, they are Friday, Saturday, and Sunday. The Thursday of each ISO week is always in the calendar year denoted by the ISO week-numbering year.

There are several mutually equivalent and compatible descriptions of week 01:

  • the week with the year's first Thursday in it (the formal ISO definition),
  • the week with 4 January in it,
  • the first week with the majority (four or more) of its days in the starting year, and
  • the week starting with the Monday in the period 29 December – 4 January.

As a consequence, if 1 January is on a Monday, Tuesday, Wednesday or Thursday, it is in week 01. If 1 January is on a Friday, Saturday or Sunday, it is in week 52 or 53 of the previous year (there is no week 00). 28 December is always in the last week of its year.

The week number can be described by counting the Thursdays: week 12 contains the 12th Thursday of the year.

Current year weeks with start and end date :

Week Number Week Start Date Week End Date
01 28 December 2020 03 January 2021
02 04 January 2021 10 January 2021
03 11 January 2021 17 January 2021
04 18 January 2021 24 January 2021
05 25 January 2021 31 January 2021
06 01 February 2021 07 February 2021
07 08 February 2021 14 February 2021
08 15 February 2021 21 February 2021
09 22 February 2021 28 February 2021
10 01 March 2021 07 March 2021
11 08 March 2021 14 March 2021
12 15 March 2021 21 March 2021
13 22 March 2021 28 March 2021
14 29 March 2021 04 April 2021
15 05 April 2021 11 April 2021
16 12 April 2021 18 April 2021
17 19 April 2021 25 April 2021
18 26 April 2021 02 May 2021
19 03 May 2021 09 May 2021
20 10 May 2021 16 May 2021
21 17 May 2021 23 May 2021
22 24 May 2021 30 May 2021
23 31 May 2021 06 June 2021
24 07 June 2021 13 June 2021
25 14 June 2021 20 June 2021
26 21 June 2021 27 June 2021
27 28 June 2021 04 July 2021
28 05 July 2021 11 July 2021
29 12 July 2021 18 July 2021
30 19 July 2021 25 July 2021
31 26 July 2021 01 August 2021
32 02 August 2021 08 August 2021
33 09 August 2021 15 August 2021
34 16 August 2021 22 August 2021
35 23 August 2021 29 August 2021
36 30 August 2021 05 September 2021
37 06 September 2021 12 September 2021
38 13 September 2021 19 September 2021
39 20 September 2021 26 September 2021
40 27 September 2021 03 October 2021
41 04 October 2021 10 October 2021
42 11 October 2021 17 October 2021
43 18 October 2021 24 October 2021
44 25 October 2021 31 October 2021
45 01 November 2021 07 November 2021
46 08 November 2021 14 November 2021
47 15 November 2021 21 November 2021
48 22 November 2021 28 November 2021
49 29 November 2021 05 December 2021
50 06 December 2021 12 December 2021
51 13 December 2021 19 December 2021
52 20 December 2021 26 December 2021
53 27 December 2021 02 January 2022