Week 42 of 2026

October 12, 2026 (Monday) to October 18, 2026 (Sunday)

← Week 41 Week 42 of 2026 Week 43 →
ISO Week Number
Week 42
2026 · Week 42 of 53 total weeks

What dates are in Week 42 of 2026?

Week 42 of 2026 runs from October 12, 2026 (Monday) to October 18, 2026 (Sunday). This is the 42th week of the year according to the ISO 8601 standard, in which weeks start on Monday.

Mon
Oct 12
Day 285
Tue
Oct 13
Day 286
Wed
Oct 14
Day 287
Thu
Oct 15
Day 288
Fri
Oct 16
Day 289
Sat
Oct 17
Day 290
Sun
Oct 18
Day 291
Starts October 12, 2026 Monday · Day 285
Ends October 18, 2026 Sunday · Day 291
Duration 7 days 2026 · 53-week year

📅 Nearby weeks in 2026

Week 40Week 41Week 42Week 43Week 44

📋 All 53 weeks in 2026

12345·678910·1112131415·1617181920·2122232425·2627282930·3132333435·3637383940·4142434445·4647484950·515253

📆 Week 42 in other years

Week 42 · 2025Week 42 · 2027

🔧 Related tools

Week Number Calculator Date to Week 2026 Full Calendar

❓ Related questions about Week 42 of 2026

What day of the week is Oct 12?

Oct 12 is a Monday. It is the first day of Week 42 of 2026.

What day of the week is Oct 18?

Oct 18 is a Sunday. It is the last day of Week 42 of 2026.

What is the ISO week number for Oct 12?

Oct 12 is in Week 42 of 2026 according to ISO 8601.

What is the ISO week number for Oct 18?

Oct 18 is in Week 42 of 2026 according to ISO 8601.

❓ Frequently asked questions about Week 42 of 2026

What dates are in Week 42 of 2026?

Week 42 of 2026 runs from October 12, 2026 to October 18, 2026.

Which day of the year does Week 42 start on?

Week 42 of 2026 starts on October 12, 2026, the 285th day of 2026.

Does Week 42 of 2026 fall entirely within 2026?

Yes, all 7 days of Week 42 of 2026 fall within 2026.

How many weeks are in 2026?

2026 has 53 weeks according to ISO 8601.