https://calendarweek.world/Current week number
Week numbers and world clocks. Simply clear.
5 October 2026 – 11 October 2026
ISO 8601 · Monday–Sunday
December 2025
| W | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 49 | |||||||
| 50 | |||||||
| 51 | |||||||
| 52 | |||||||
| 01 |
Which week is this date?
Choose a date or select a day in the calendar.
Year overview 2026
| W | From (Mon) | To (Sun) |
|---|---|---|
| 01 | ||
| 02 | ||
| 03 | ||
| 04 | ||
| 05 | ||
| 06 | ||
| 07 | ||
| 08 | ||
| 09 | ||
| 10 | ||
| 11 | ||
| 12 | ||
| 13 | ||
| 14 | ||
| 15 | ||
| 16 | ||
| 17 | ||
| 18 |
| W | From (Mon) | To (Sun) |
|---|---|---|
| 19 | ||
| 20 | ||
| 21 | ||
| 22 | ||
| 23 | ||
| 24 | ||
| 25 | ||
| 26 | ||
| 27 | ||
| 28 | ||
| 29 | ||
| 30 | ||
| 31 | ||
| 32 | ||
| 33 | ||
| 34 | ||
| 35 | ||
| 36 |
| W | From (Mon) | To (Sun) |
|---|---|---|
| 37 | ||
| 38 | ||
| 39 | ||
| 40 | ||
| 41 | ||
| 42 | ||
| 43 | ||
| 44 | ||
| 45 | ||
| 46 | ||
| 47 | ||
| 48 | ||
| 49 | ||
| 50 | ||
| 51 | ||
| 52 | ||
| 53 |
How are week numbers counted?
ISO 8601 weeks run from Monday to Sunday. Week 1 contains 4 January. A week year has 52 or 53 weeks.
What happens at New Year?
Early January can belong to the previous week year. Late December can already belong to week 1 of the next week year.
Calendar guide & sources
Which week-year does a date belong to? Which print layout suits your plans? What does an empty holiday list mean? This guide explains how to use our calendar and interpret its results.
Understand week numbers and plan dates with confidenceWeek calendars for planning
Week numbers help with deliveries, work schedules and projects. Include the week year when sharing dates around New Year.
Is ISO week numbering used everywhere?
This website uses ISO 8601 in every language. Other calendars may start weeks on Sunday or assign 1 January differently.
The initial date uses Europe/Zurich. Then “Today” follows your device.
World clock
Compare current times worldwide and convert a date between time zones.
New Year countdown and New Year’s Eve countdown
Count down the hours, minutes and seconds to the new year for free. The New Year’s Eve countdown becomes available during the final 24 hours before midnight in your device’s automatically detected time zone. Open it using the countdown button beside your local clock.
Data accuracy and liability
All calendar, public-holiday and school-holiday information is for general guidance. We do not guarantee its accuracy, completeness or timeliness. Regional, local and school-specific differences and short-notice changes are possible. Confirm binding dates with the relevant authority, municipality or school before making plans. Liability for losses arising from use of this information is excluded to the extent permitted by law. Mandatory statutory liability remains unaffected.