Week 42 of 2027: Dates
Week 42 of 2027 starts on Monday, October 18, 2027 and ends on Sunday, October 24, 2027. It falls in October, in the fourth quarter of 2027.
The days of week 42, 2027
| Day | Date | Day of year | US federal holiday |
|---|---|---|---|
| Monday | October 18, 2027 | Day 291 | |
| Tuesday | October 19, 2027 | Day 292 | |
| Wednesday | October 20, 2027 | Day 293 | |
| Thursday | October 21, 2027 | Day 294 | |
| Friday | October 22, 2027 | Day 295 | |
| Saturday | October 23, 2027 | Day 296 | |
| Sunday | October 24, 2027 | Day 297 |
Other days in this week: Shemini Atzeret, Simchat Torah, Karva Chauth.
ISO and US week numbers
Week 42 covers days 291 to 297 of 2027. US calendars start the week a day earlier, on Sunday, October 17. On that count the same Monday is in week 43 of 2027, one off from the ISO number. To check it in Excel or Google Sheets, =ISOWEEKNUM(DATE(2027,10,18)) returns 42 and =WEEKNUM(DATE(2027,10,18)) returns 43.
Week 42 by year
| Year | Monday | Sunday |
|---|---|---|
| 2027 | October 18, 2027 | October 24, 2027 |
| 2028 | October 16, 2028 | October 22, 2028 |
| 2029 | October 15, 2029 | October 21, 2029 |
| 2030 | October 14, 2030 | October 20, 2030 |
| 2031 | October 13, 2031 | October 19, 2031 |
| 2032 | October 11, 2032 | October 17, 2032 |
This page shows the next week 42 that has not ended yet. ISO weeks start on Monday, and week 1 contains the year's first Thursday.
Week 42 questions
When does week 42 of 2027 start?
On Monday, October 18, 2027. It ends on Sunday, October 24, 2027, seven days later.
Does every year have a week 42?
Yes. Every ISO year has weeks 1 to 52, and only some have a week 53.
Related pages
Cite this page
APA: ClockTotals. (2026, October 26). Week 42 of 2027: Dates. https://clocktotals.com/week-number/42/
MLA: “Week 42 of 2027: Dates.” ClockTotals, 26 Oct. 2026, clocktotals.com/week-number/42/.
Link (HTML): <a href="https://clocktotals.com/week-number/42/">Week 42 of 2027: Dates</a>