Week Numbers 2028

What Week of the Year Is It
Week numbers of

How many ISO weeks are in 2028?

Answer

will have
52 ISO weeks

2028 starts in 452 days, on Saturday, January 1, 2028. (UTC)

ISO week 1 of 2028 starts on Monday, January 3, 2028 — in 454 days.

All 52 ISO weeks of 2028

WeekMondaySunday
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52

ISO weeks are always whole, Monday to Sunday, so the numbering of 2028 starts on Monday, January 3, 2028, and ends on Sunday, December 31, 2028. To see these weeks inside the months, open the 2028 calendar with week numbers.

Why 2028 has 52 ISO weeks

53 weeks ⇔ January 1 is a Thursday, or a Wednesday in a leap year

2028 starts on Saturday, January 1, 2028, and ends on Sunday, December 31, 2028; it is a leap year of 366 days. Neither condition holds, so it has 52 numbered weeks. Week 1 is the week that contains the first Thursday of the year, January 6, 2028.

Counted as whole blocks of seven days inside the calendar year, 2028 is 366 = 52 × 7 + 2, that is 52 weeks and 2 days. Both are true: the numbered ISO weeks are whole, so the first and the last of them may borrow days from the neighbouring years.

In the US numbering (weeks from Sunday, week 1 is the week that contains January 1) 2028 has 53 weeks, and week 1 starts on Sunday, December 26, 2027.

See Also

What Week of the Year Is It

This page tells you the number of the current week in the ISO 8601 system — weeks start on Monday and week 1 is the week with the first Thursday of the year — and in the US system, where weeks start on Sunday. For any year it lists every numbered week with the dates of its Monday and Sunday. For example, it can help you find out how many ISO weeks are in 2028? (The answer is: 52 weeks). Enter a year (e.g. "2026") and hit the "Show" button.

ISO Weeks in Nearby Years

YearISO weeksWeek 1 startsLast week ends
202053Dec 30, 2019Jan 3, 2021
202152Jan 4, 2021Jan 2, 2022
202252Jan 3, 2022Jan 1, 2023
202352Jan 2, 2023Dec 31, 2023
202452Jan 1, 2024Dec 29, 2024
202552Dec 30, 2024Dec 28, 2025
202653Dec 29, 2025Jan 3, 2027
202752Jan 4, 2027Jan 2, 2028
202852Jan 3, 2028Dec 31, 2028
202952Jan 1, 2029Dec 30, 2029
203052Dec 31, 2029Dec 29, 2030

FAQ

How many ISO weeks are in 2028?

2028 will have 52 ISO weeks

When does week 1 of 2028 start?

Week 1 of 2028 runs from Monday, January 3, 2028, to Sunday, January 9, 2028. It is the week that contains the first Thursday of the year, January 6, 2028.

When does the last week of 2028 end?

The last ISO week of 2028 is week 52: Monday, December 25, 2028, to Sunday, December 31, 2028.

Why does 2028 have 52 ISO weeks?

2028 starts on a Saturday and ends on a Sunday, and it is a leap year of 366 days. A year has 53 ISO weeks only when 1 January is a Thursday, or a Wednesday in a leap year; neither holds here, so it has 52.