ISO WEEK
40
2026
September 28 – October 4, 2026
Week 40 of 53
75% through 2026
Days in Week 40
MonSeptember 28
🌕 Full Moon
TueSeptember 29
🌖 Waning Gibbous
WedSeptember 30
🌖 Waning Gibbous
ThuOctober 1
🌖 Waning Gibbous
FriOctober 2
🌗 Last Quarter
SatOctober 3
🌗 Last Quarter
SunOctober 4
🌗 Last Quarter
Moon Phases This Week
- 🌕 Full Moon — Monday, September 28
- 🌖 Waning Gibbous — Tuesday, September 29
- 🌖 Waning Gibbous — Wednesday, September 30
- 🌖 Waning Gibbous — Thursday, October 1
- 🌗 Last Quarter — Friday, October 2
- 🌗 Last Quarter — Saturday, October 3
- 🌗 Last Quarter — Sunday, October 4
FAQs
When does Week 40 2026 start and end?
Week 40 of 2026 starts on September 28 (Monday) and ends on October 4, 2026 (Sunday).
What month is Week 40 in?
Week 40 of 2026 is primarily in October. It spans two calendar months.
How many weeks are in 2026?
2026 has 53 ISO weeks. 2026 is a long year with 53 weeks.
