What's the Current Week Number?
See the current ISO week number, its exact Monday-to-Sunday date range, and every numbered week in the year.
What Week of the Year Is It?
It is currently week 36 of 2026. This ISO week runs from Monday, August 31, 2026 through Sunday, September 6, 2026.
What's the week number for any date?
Choose a date to find its ISO week number and week-year.
Weeks around today
Compare the current ISO week with the week immediately before and after it.
2026 Week Number Calendar
Every ISO week of 2026, listed with its Monday start and Sunday end date.
| Week | Starts | Ends |
|---|---|---|
01Week 1 |
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02Week 2 |
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03Week 3 |
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04Week 4 |
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05Week 5 |
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06Week 6 |
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07Week 7 |
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08Week 8 |
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09Week 9 |
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10Week 10 |
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11Week 11 |
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12Week 12 |
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13Week 13 |
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14Week 14 |
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15Week 15 |
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16Week 16 |
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17Week 17 |
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18Week 18 |
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19Week 19 |
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20Week 20 |
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21Week 21 |
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22Week 22 |
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23Week 23 |
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24Week 24 |
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25Week 25 |
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26Week 26 |
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27Week 27 |
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28Week 28 |
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29Week 29 |
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30Week 30 |
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31Week 31 |
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32Week 32 |
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33Week 33 |
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34Week 34 |
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35Week 35 |
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36Week 36Current |
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37Week 37 |
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38Week 38 |
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39Week 39 |
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40Week 40 |
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41Week 41 |
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42Week 42 |
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43Week 43 |
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44Week 44 |
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45Week 45 |
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46Week 46 |
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47Week 47 |
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48Week 48 |
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49Week 49 |
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50Week 50 |
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51Week 51 |
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52Week 52 |
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53Week 53 |
What's the current week number?
The current week number is 36. It is ISO week 36 of 2026.
Week numbers make it easier to refer to the same seven-day block in schedules, reports, school calendars and project plans without repeating a full date range.
What week of the year is it?
We are in week 36 of 2026. The answer follows ISO 8601, where each week begins on Monday and ends on Sunday.
How is the current week number calculated?
ISO week 1 is the week containing the first Thursday of the year. Another equivalent rule says it is the week containing January 4. After that, weeks continue in complete Monday-to-Sunday blocks.
Does every year have 52 weeks?
Most ISO week-years have 52 weeks, but some have 53. A 53rd week appears when the calendar alignment leaves enough days for one final complete ISO week.
Why can the week-year differ from the calendar year?
The first days of January can belong to the final ISO week of the previous year, while the last days of December can belong to week 1 of the next ISO year. The week-year shown here follows the week itself.
ISO week number versus Sunday-start calendars
This page uses the international ISO 8601 system. Some calendars, especially in the United States, display Sunday as the first day of the week and may produce a different week number near the beginning or end of a year.