ISO week
2026-W46
Weeks start on Monday. Week 1 contains the first Thursday of the year.
Mon Tue Wed Thu Fri Sat Sun
Fast, ISO-aware week number tool
What Week Is It?
Today is in ISO Week 46 of 2026, from Monday, November 9, 2026 to Sunday, November 15, 2026; the US-style week number is Week 46, based on UTC.
Timezone used: UTC.
WEEK CONSOLE
Week 46
ISO week 2026-W46
- Date range
- Monday, November 9, 2026 – Sunday, November 15, 2026
- Time zone
- UTC
- US-style Week 46
- Weeks left 7 in 2026
-
87% ISO year ISO year progress Week 46 of 53 - Year length 2026 has 53 ISO weeks
Week at a glance 2026-W46
- Mon 9
- Tue 10
- Wed 11
- Thu 12
- Fri 13
- Sat 14
- Sun 15
Find the current ISO week number, date range, US-style week number, and verified holiday context when available.
- ISO-aware
- Time zone aware
- US-style comparison
Quick converter
Convert a date to an ISO or US-style week number.
Plan across 2026 and 2027
ISO Week 53 of 2026 runs from December 28, 2026 to January 3, 2027. Week 1 of 2027 starts on January 4. Use the 2027 calendar for printable PDFs, week date ranges, and a CSV you can open in a spreadsheet.
ISO vs US-style week numbers
The same date can belong to different week numbers depending on the week system.
US-style week
Week 46
Weeks start on Sunday. Week 1 contains January 1.
Sun Mon Tue Wed Thu Fri Sat
Location-aware planning
Holiday planning by location
Holiday calendars depend on the country or region you choose. Use the date-to-week tool to view verified holiday data when it is available.
Choose a timezone and countryNovember 2026
UTC baseline calendar. ISO week numbers are in the first column.
| Wk | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 44 | |||||||
| 45 | |||||||
| 46 | |||||||
| 47 | |||||||
| 48 | |||||||
| 49 |
Popular tools
Jump from the current week answer into converters, calendars, and developer references.
Week number calculator Convert dates to ISO or US-style week numbers. Open tool Date to week Find the week number, week year, and date range for any date. Open tool Week to date Turn a week number into a full date range. Open tool Weeks between dates Count full or partial weeks between two dates. Open tool 2026 Calendar & 53-week years Explore 2026 week numbers and 53-week year rules. Open tool Developer tools & API Use API responses, embed widgets, and code examples. Open tool
Plan dates in weeks
A week number identifies a calendar week. These tools measure seven-day durations for deadlines, countdowns, and progress.
Add or subtract weeks
Move a date forward or backward by whole weeks and find its ISO week number.
Weeks until a date
Break a deadline countdown into full weeks and remaining days.
Weeks left in the year
Count calendar days through December 31, rather than the future ISO week numbers shown above.
Weeks since a date
Measure time elapsed since a project start or milestone using calendar dates.
Why week numbers differ
ISO weeks start on Monday and define Week 1 as the week containing the first Thursday of the year. US-style weeks usually start on Sunday and count the week containing January 1 as Week 1. Around New Year, these systems often show different week years and week numbers.
FAQ
What is the current ISO week?
The current ISO week is 2026-W46, based on UTC. The answer at the top is personalized to your browser timezone when available.
Does 2026 have 53 ISO weeks?
Yes. 2026 has 53 ISO weeks, and Week 53 runs from Monday, December 28, 2026 to Sunday, January 3, 2027.
Why is the US-style week number different?
US-style week numbering starts weeks on Sunday and counts Week 1 as the week containing January 1, so it can differ from ISO around New Year.