October 12–18, 2026
MonTueWedThuFriSatSun
Week 1 contains the first Thursday of the year.ISO guide →Date → week number
October 12, 2026: What week number?
Monday, October 12, 2026ISO Week 422026-W42
ISO Week 42 runs from October 12, 2026 to October 18, 2026.
ISO vs US-style week numbers
The same date can have different week numbers
ISO weeks start on Monday. The simplified US-style system starts on Sunday and counts the week containing January 1 as Week 1.
October 11–17, 2026
SunMonTueWedThuFriSat
Week 1 contains January 1.US-style guide →ISO weekWeek 42
US-style weekWeek 42
WeekdayMonday
QuarterQ4
Day of year285 / 365
ISO weekday1 / 7
October 2026
Date context
Monday, October 12, 2026 is day 285 of 2026 and belongs to ISO Week 42.
The entire ISO Week 42 falls within October.
Distance from today
How long until October 12, 2026?
Days56
Full weeks8
Remaining days0
October 12, 2026 is 56 days from today, equal to 8 full weeks.