Current Week Number
Find ISO week numbers and Monday-to-Sunday date ranges for 2026. The current week is calculated using the UTC calendar date; each ISO year contains 52 or 53 complete weeks.
Week 43, 2026
· UTC · 53 ISO weeks in 2026
Week dates in 2026
| ISO week | Monday | Sunday |
|---|---|---|
| 2026-W01 | ||
| 2026-W02 | ||
| 2026-W03 | ||
| 2026-W04 | ||
| 2026-W05 | ||
| 2026-W06 | ||
| 2026-W07 | ||
| 2026-W08 | ||
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| 2026-W11 | ||
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| 2026-W14 | ||
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| 2026-W16 | ||
| 2026-W17 | ||
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| 2026-W19 | ||
| 2026-W20 | ||
| 2026-W21 | ||
| 2026-W22 | ||
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| 2026-W24 | ||
| 2026-W25 | ||
| 2026-W26 | ||
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| 2026-W28 | ||
| 2026-W29 | ||
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| 2026-W31 | ||
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| 2026-W33 | ||
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| 2026-W39 | ||
| 2026-W40 | ||
| 2026-W41 | ||
| 2026-W42 | ||
| 2026-W43 | ||
| 2026-W44 | ||
| 2026-W45 | ||
| 2026-W46 | ||
| 2026-W47 | ||
| 2026-W48 | ||
| 2026-W49 | ||
| 2026-W50 | ||
| 2026-W51 | ||
| 2026-W52 | ||
| 2026-W53 |
Frequently asked questions
Which day starts the week?
Each calendar row starts on Monday and ends on Sunday, following ISO 8601.
How are ISO week numbers assigned?
Week 1 contains January 4, or equivalently the first Thursday of the year. Dates at either end of a year can belong to the adjacent ISO week-year.
Why do some years have 53 weeks?
An ISO year has 53 weeks when January 1 is a Thursday, or when a leap year starts on Wednesday.