Week Numbers 2026

What Week of the Year Is It
Week numbers of

What week of 2026 is it today?

Answer

Today, , is in ISO
week 46

ISO week 46 of 2026 runs from Monday, November 9, 2026, to Sunday, November 15, 2026. (UTC)

In the US week numbering (weeks run Sunday to Saturday, week 1 is the week that contains January 1) today is in week 47 of 2026: Sunday, November 15, 2026, to Saturday, November 21, 2026.

January 1, 2026, is a Thursday, a common year → 53 ISO weeks (53 only when January 1 is a Thursday, or a Wednesday in a leap year)

All 53 ISO weeks of 2026

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
53

ISO weeks are always whole, Monday to Sunday, so the numbering of 2026 starts on Monday, December 29, 2025, and ends on Sunday, January 3, 2027.

Other ways to count the weeks of 2026

Counted as whole blocks of seven days inside the calendar year, 2026 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 2026 has 52 weeks, and week 1 starts on Sunday, December 28, 2025.

See Also

ISO Weeks in Nearby Years

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

FAQ

What week of 2026 is it today?

Today, November 15, 2026, is in ISO week 46

When does week 1 of 2026 start?

Week 1 of 2026 runs from Monday, December 29, 2025, to Sunday, January 4, 2026. It is the week that contains the first Thursday of the year, January 1, 2026.

When does the last week of 2026 end?

The last ISO week of 2026 is week 53: Monday, December 28, 2026, to Sunday, January 3, 2027.

Why does 2026 have 53 ISO weeks?

2026 starts on a Thursday and ends on a Thursday, and it is a common year of 365 days. A year has 53 ISO weeks when 1 January is a Thursday, or a Wednesday in a leap year — here it is a Thursday.