Nykyinen viikon numero
18
...
Toukokuu 2026 Viikkonumeroilla varustettu kalenteri
| Viikko | Ma | Ti | Ke | To | Pe | La | Aurinko |
|---|---|---|---|---|---|---|---|
| 18 | 27 | 28 | 29 | 30 | 1 | 2 | 3 |
| 19 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 20 | 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| 21 | 18 | 19 | 20 | 21 | 22 | 23 | 24 |
| 22 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
* Korostettu rivi edustaa nykyistä ISO-8601 viikkoa.
Lomat tällä viikolla
Yleisimmät kysymykset viikkonumeroista
What is the current week number?
The current ISO week number is 18.
How is the first week of the year defined?
According to ISO 8601, Week 1 is the week that contains the first Thursday of the year, or the week that contains January 4th.
Does a week start on Sunday or Monday?
Under the ISO 8601 standard, the week always starts on Monday.
Why do some years have 53 weeks?
A year has 53 weeks if January 1st falls on a Thursday (or Wednesday in a leap year).
How many weeks are in 2026?
The year 2026 has 53 weeks according to the ISO 8601 standard.
When does the current week end?
The current week ends on Sunday, which is the 7th day of the ISO cycle.
Selaa viikkoa 18 vuosittain
Kaikki viikot 2026
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
Click any number above to view specific dates, holidays, and details for that week of the year.
Kuinka näyttää viikkonumerot...
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Standardi: ISO 8601
The ISO 8601 standard is the international agreement for representing dates and times. It defines the week as starting on Maanantai ja viikko 1 on viikko, joka sisältää vuoden ensimmäisen torstain.