Week numbers 2026

The week year 2026 has 53 ISO weeks. 29 December 2025 – 3 January 2027.

W	From (Mon)	To (Sun)
01	29/12 2025	04/01
02	05/01	11/01
03	12/01	18/01
04	19/01	25/01
05	26/01	01/02
06	02/02	08/02
07	09/02	15/02
08	16/02	22/02
09	23/02	01/03
10	02/03	08/03
11	09/03	15/03
12	16/03	22/03
13	23/03	29/03
14	30/03	05/04
15	06/04	12/04
16	13/04	19/04
17	20/04	26/04
18	27/04	03/05

W	From (Mon)	To (Sun)
19	04/05	10/05
20	11/05	17/05
21	18/05	24/05
22	25/05	31/05
23	01/06	07/06
24	08/06	14/06
25	15/06	21/06
26	22/06	28/06
27	29/06	05/07
28	06/07	12/07
29	13/07	19/07
30	20/07	26/07
31	27/07	02/08
32	03/08	09/08
33	10/08	16/08
34	17/08	23/08
35	24/08	30/08
36	31/08	06/09

W	From (Mon)	To (Sun)
37	07/09	13/09
38	14/09	20/09
39	21/09	27/09
40	28/09	04/10
41	05/10	11/10
42	12/10	18/10
43	19/10	25/10
44	26/10	01/11
45	02/11	08/11
46	09/11	15/11
47	16/11	22/11
48	23/11	29/11
49	30/11	06/12
50	07/12	13/12
51	14/12	20/12
52	21/12	27/12
53	28/12	03/01 2027

ISO 8601 · calendarweek.world

What happens at New Year?

Early January can belong to the previous week year. Late December can already belong to week 1 of the next week year. Dates outside the calendar year include their year in the table.

Other year calendars

Data accuracy and liability

All calendar, public-holiday and school-holiday information is for general guidance. We do not guarantee its accuracy, completeness or timeliness. Regional, local and school-specific differences and short-notice changes are possible. Confirm binding dates with the relevant authority, municipality or school before making plans. Liability for losses arising from use of this information is excluded to the extent permitted by law. Mandatory statutory liability remains unaffected.