Week Numbers 2030

What Week of the Year Is It
Week numbers of

How many ISO weeks are in 2030?

Answer

will have
52 ISO weeks

2030 starts in 1,183 days, on Tuesday, January 1, 2030. (UTC)

ISO week 1 of 2030 starts on Monday, December 31, 2029 — in 1,182 days.

All 52 ISO weeks of 2030

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 2030 starts on Monday, December 31, 2029, and ends on Sunday, December 29, 2030. To see these weeks inside the months, open the 2030 calendar with week numbers.

Why 2030 has 52 ISO weeks

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

2030 starts on Tuesday, January 1, 2030, and ends on Tuesday, December 31, 2030; it is a common year of 365 days. Neither condition holds, so it has 52 numbered weeks. Week 1 is the week that contains the first Thursday of the year, January 3, 2030.

Counted as whole blocks of seven days inside the calendar year, 2030 is 365 = 52 × 7 + 1, that is 52 weeks and 1 day. 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) 2030 has 52 weeks, and week 1 starts on Sunday, December 30, 2029.

Related Calculations

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 2030? (The answer is: 52 weeks). Enter a year (e.g. "2026") and hit the "Show" button.
Recalculate with different values ↑

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 2030?

2030 will have 52 ISO weeks

When does week 1 of 2030 start?

Week 1 of 2030 runs from Monday, December 31, 2029, to Sunday, January 6, 2030. It is the week that contains the first Thursday of the year, January 3, 2030.

When does the last week of 2030 end?

The last ISO week of 2030 is week 52: Monday, December 23, 2030, to Sunday, December 29, 2030. December 31, 2030, already belongs to week 1 of 2031.

Why does 2030 have 52 ISO weeks?

2030 starts on a Tuesday and ends on a Tuesday, and it is a common year of 365 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.

See Also