Week 43 of 2026 runs October 19, 2026 to October 25, 2026.
Week 43 starts on Monday, October 19, 2026 and ends on Sunday, October 25, 2026. It's the 292nd day of the year, sits in Q4, and falls in October. By the end of this week, 298 of 365 days are gone, putting 2026 at 81.6%.
There are no public holidays this week, so all 5 weekdays are working days. Need a different week? Browse the full 2026 week calendar, or jump to this week's number.
Week 43 at a glance
The 7 days of week 43
Every date in week 43 of 2026, Monday through Sunday, with day-of-year numbers and events.
| Day | Date | Day no. | Type | Events |
|---|---|---|---|---|
| Monday | Day 292 | Weekday | ||
| Tuesday | Day 293 | Weekday | ||
| Wednesday | Day 294 | Weekday | ||
| Thursday | Day 295 | Weekday | ||
| Friday | Day 296 | Weekday | ||
| Saturday | Day 297 | Weekend | ||
| Sunday | Day 298 | Weekend |
What week 43 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 43 is one piece of that system.
In 2026, week 43 covers Oct 19 – Oct 25, 2026. That's October, deep in Q4. The same week number shifts by a day or two each year, so week 43 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 43 of 2026
🇬🇧 United Kingdom
Daylight Saving Time — Fall Back
ObservanceWeek 43 across years
The same ISO week number lands on different dates each year. Here's how week 43 shifts.
Week 43 of 2026: questions and answers
What days are in week 43 of 2026?
Week 43 of 2026 runs from October 19, 2026 (Monday) through October 25, 2026 (Sunday). It spans October.
What month is week 43 in 2026?
Week 43 of 2026 falls entirely in October 2026.
How many working days are in week 43 of 2026?
Week 43 of 2026 has 5 working days.
What quarter is week 43 of 2026 in?
Week 43 of 2026 is in Q4 (2026). The week starts on day 292 of 365.
What is ISO week 43?
ISO week 43 is defined by the ISO 8601 international standard. It begins on Monday, October 19, 2026, and ends on Sunday, October 25, 2026. It is week 81% through the ISO year 2026.