Week numbers 2028

The week year 2028 has 52 ISO weeks. 3 January 2028 – 31 December 2028.

How many weeks are in 2028?

The ISO week-numbering year 2028 has 52 numbered weeks. The calendar year has 366 days: 52 full weeks plus 2 extra days. The table lists Monday to Sunday for each ISO week. These weeks can extend before January 1 or after December 31.

2028 at a glance

First ISO week: 3 January 2028 – 9 January 2028
Last ISO week: 25 December 2028 – 31 December 2028
January 1: Week 52 / 2027
December 31: Week 52 / 2028
Days in the calendar year: 366

Why 52 numbered weeks?

2028 does not meet the condition for 53 ISO weeks: January 1 would need to be a Thursday, or a Wednesday in a leap year. This week-year therefore has 52 numbered weeks.

For dates around New Year, include the week-year alongside the week number. The assignments above explicitly show whether January 1 or December 31 belongs to a neighbouring week-year.

Choose a print layout for 2028

One page is useful for quick reference. Twelve monthly pages provide more room for handwritten appointments. The print layout includes dates and ISO weeks, not public holidays or school holidays.

Calendar guide & sources

Full-year calendar with every day

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

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

W	From (Mon)	To (Sun)
37	11/09	17/09
38	18/09	24/09
39	25/09	01/10
40	02/10	08/10
41	09/10	15/10
42	16/10	22/10
43	23/10	29/10
44	30/10	05/11
45	06/11	12/11
46	13/11	19/11
47	20/11	26/11
48	27/11	03/12
49	04/12	10/12
50	11/12	17/12
51	18/12	24/12
52	25/12	31/12

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.