ISO WEEK
40
2025
September 29 – October 5, 2025
Week 40 of 52
77% through 2025
Days in Week 40
MonSeptember 29
🌓 First Quarter
TueSeptember 30
🌓 First Quarter
WedOctober 1
🌓 First Quarter
ThuOctober 2
🌔 Waxing Gibbous
FriOctober 3
🌔 Waxing Gibbous
SatOctober 4
🌔 Waxing Gibbous
SunOctober 5
🌔 Waxing Gibbous
Moon Phases This Week
- 🌓 First Quarter — Monday, September 29
- 🌓 First Quarter — Tuesday, September 30
- 🌓 First Quarter — Wednesday, October 1
- 🌔 Waxing Gibbous — Thursday, October 2
- 🌔 Waxing Gibbous — Friday, October 3
- 🌔 Waxing Gibbous — Saturday, October 4
- 🌔 Waxing Gibbous — Sunday, October 5
FAQs
When does Week 40 2025 start and end?
Week 40 of 2025 starts on September 29 (Monday) and ends on October 5, 2025 (Sunday).
What month is Week 40 in?
Week 40 of 2025 is primarily in October. It spans two calendar months.
How many weeks are in 2025?
2025 has 52 ISO weeks. Most years have 52 weeks.
