ISO Week · 2026 · Q4
Week 42
2026 · –
October · 4 working days · 79% through 2026
Week 42 of 2026 runs October 12, 2026 to October 18, 2026.
Week 42 starts on Monday, October 12, 2026 and ends on Sunday, October 18, 2026. It's the 285th day of the year, sits in Q4, and falls in October. By the end of this week, 291 of 365 days are gone, putting 2026 at 79.7%.
This week includes Thanksgiving (Canada), so it has 4 working days instead of the usual 5. Need a different week? Browse the full 2026 week calendar, or jump to this week's number.
Week 42 at a glance
The 7 days of week 42
Every date in week 42 of 2026, Monday through Sunday, with day-of-year numbers and events.
| Day | Date | Day no. | Type | Events |
|---|---|---|---|---|
| Monday | Day 285 | Weekday | Thanksgiving (Canada) | |
| Tuesday | Day 286 | Weekday | ||
| Wednesday | Day 287 | Weekday | ||
| Thursday | Day 288 | Weekday | ||
| Friday | Day 289 | Weekday | ||
| Saturday | Day 290 | Weekend | ||
| Sunday | Day 291 | Weekend |
What week 42 of 2026 means
ISO 8601 numbers weeks so every week starts on Monday and ends on Sunday. Week 1 is the one holding the year's first Thursday, which is why early January can land in week 52 or 53 of the previous year. Week 42 is one piece of that system.
In 2026, week 42 covers Oct 12 – Oct 18, 2026. That's October, deep in Q4. The same week number shifts by a day or two each year, so week 42 in 2027 won't share these exact dates. The table below shows how it moves.
Want to check a specific date instead of a week number? The week calculator converts any date to its ISO week. Curious how many weeks a year holds? The weeks in a year guide explains 52 versus 53. And the ISO week number page covers the standard end to end.
Holidays in week 42 of 2026
🇺🇸 United States
🇨🇦 Canada
Week 42 across years
The same ISO week number lands on different dates each year. Here's how week 42 shifts.
| Year | From (Mon) | To (Sun) | Notable | |
|---|---|---|---|---|
| 2024 | Thanksgiving (Canada) | view → | ||
| 2025 | Thanksgiving (Canada) | view → | ||
| 2026 THIS YEAR | Thanksgiving (Canada) | |||
| 2027 | view → | |||
| 2028 | view → | |||
| 2029 | view → |
Week 42 of 2026: questions and answers
What days are in week 42 of 2026?
Week 42 of 2026 runs from October 12, 2026 (Monday) through October 18, 2026 (Sunday). It spans October.
What month is week 42 in 2026?
Week 42 of 2026 falls entirely in October 2026.
How many working days are in week 42 of 2026?
Week 42 of 2026 has 4 working days — reduced from 5 due to Thanksgiving (Canada) falling on a weekday.
What week is Thanksgiving (Canada) in 2026?
Thanksgiving (Canada) falls in ISO week 42 of 2026 (Oct 12 – Oct 18, 2026).
What quarter is week 42 of 2026 in?
Week 42 of 2026 is in Q4 (2026). The week starts on day 285 of 365.
What is ISO week 42?
ISO week 42 is defined by the ISO 8601 international standard. It begins on Monday, October 12, 2026, and ends on Sunday, October 18, 2026. It is week 79% through the ISO year 2026.