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2020 Week Numbers

ISO 8601 week numbers — every week runs Monday to Sunday.

Current ISO week number

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Week Numbers 2020

Week #	Start date (Mon)	End date (Sun)
▸ 1	Mon, 30 Dec 2019	Sun, 5 Jan 2020
▸ 2	Mon, 6 Jan 2020	Sun, 12 Jan 2020
▸ 3	Mon, 13 Jan 2020	Sun, 19 Jan 2020
▸ 4	Mon, 20 Jan 2020	Sun, 26 Jan 2020
▸ 5	Mon, 27 Jan 2020	Sun, 2 Feb 2020
▸ 6	Mon, 3 Feb 2020	Sun, 9 Feb 2020
▸ 7	Mon, 10 Feb 2020	Sun, 16 Feb 2020
▸ 8	Mon, 17 Feb 2020	Sun, 23 Feb 2020
▸ 9	Mon, 24 Feb 2020	Sun, 1 Mar 2020
▸ 10	Mon, 2 Mar 2020	Sun, 8 Mar 2020
▸ 11	Mon, 9 Mar 2020	Sun, 15 Mar 2020
▸ 12	Mon, 16 Mar 2020	Sun, 22 Mar 2020
▸ 13	Mon, 23 Mar 2020	Sun, 29 Mar 2020
▸ 14	Mon, 30 Mar 2020	Sun, 5 Apr 2020
▸ 15	Mon, 6 Apr 2020	Sun, 12 Apr 2020
▸ 16	Mon, 13 Apr 2020	Sun, 19 Apr 2020
▸ 17	Mon, 20 Apr 2020	Sun, 26 Apr 2020
▸ 18	Mon, 27 Apr 2020	Sun, 3 May 2020
▸ 19	Mon, 4 May 2020	Sun, 10 May 2020
▸ 20	Mon, 11 May 2020	Sun, 17 May 2020
▸ 21	Mon, 18 May 2020	Sun, 24 May 2020
▸ 22	Mon, 25 May 2020	Sun, 31 May 2020
▸ 23	Mon, 1 Jun 2020	Sun, 7 Jun 2020
▸ 24	Mon, 8 Jun 2020	Sun, 14 Jun 2020
▸ 25	Mon, 15 Jun 2020	Sun, 21 Jun 2020
▸ 26	Mon, 22 Jun 2020	Sun, 28 Jun 2020
▸ 27	Mon, 29 Jun 2020	Sun, 5 Jul 2020
▸ 28	Mon, 6 Jul 2020	Sun, 12 Jul 2020
▸ 29	Mon, 13 Jul 2020	Sun, 19 Jul 2020
▸ 30	Mon, 20 Jul 2020	Sun, 26 Jul 2020
▸ 31	Mon, 27 Jul 2020	Sun, 2 Aug 2020
▸ 32	Mon, 3 Aug 2020	Sun, 9 Aug 2020
▸ 33	Mon, 10 Aug 2020	Sun, 16 Aug 2020
▸ 34	Mon, 17 Aug 2020	Sun, 23 Aug 2020
▸ 35	Mon, 24 Aug 2020	Sun, 30 Aug 2020
▸ 36	Mon, 31 Aug 2020	Sun, 6 Sep 2020
▸ 37	Mon, 7 Sep 2020	Sun, 13 Sep 2020
▸ 38	Mon, 14 Sep 2020	Sun, 20 Sep 2020
▸ 39	Mon, 21 Sep 2020	Sun, 27 Sep 2020
▸ 40	Mon, 28 Sep 2020	Sun, 4 Oct 2020
▸ 41	Mon, 5 Oct 2020	Sun, 11 Oct 2020
▸ 42	Mon, 12 Oct 2020	Sun, 18 Oct 2020
▸ 43	Mon, 19 Oct 2020	Sun, 25 Oct 2020
▸ 44	Mon, 26 Oct 2020	Sun, 1 Nov 2020
▸ 45	Mon, 2 Nov 2020	Sun, 8 Nov 2020
▸ 46	Mon, 9 Nov 2020	Sun, 15 Nov 2020
▸ 47	Mon, 16 Nov 2020	Sun, 22 Nov 2020
▸ 48	Mon, 23 Nov 2020	Sun, 29 Nov 2020
▸ 49	Mon, 30 Nov 2020	Sun, 6 Dec 2020
▸ 50	Mon, 7 Dec 2020	Sun, 13 Dec 2020
▸ 51	Mon, 14 Dec 2020	Sun, 20 Dec 2020
▸ 52	Mon, 21 Dec 2020	Sun, 27 Dec 2020
▸ 53	Mon, 28 Dec 2020	Sun, 3 Jan 2021

About ISO 8601 Week Numbers

Under the ISO 8601 standard, weeks start on Monday and are numbered from 1 to 52 or 53. Week 1 is the week that contains the first Thursday of the year — equivalently, the week containing January 4th. As a result, the first few days of January can fall in the last week of the previous year, and the last days of December can fall in week 1 of the next year.

A year has 53 ISO weeks when it starts on a Thursday, or on a Wednesday in a leap year; otherwise it has 52. 2020 has 53 ISO weeks.