Week 42 Calendar 2025. Week 42 begins on monday, 13 october 2025. Mainly in europe and asia, the international iso 8601 definition is used for counting calendar weeks:
Also holidays, red days, flag days, namedays, days off, and dates for easter, pentecost, and midsummer. Calendar week (week number) 42 is from monday, october 13, 2025 until (and including) sunday, october 19, 2025.