What week number is it today?
Today is week 42 of 2026 (Mon 12 October – Sun 18 October). Weeks follow ISO 8601; 2026 has 53 weeks.
Week 42
Mon 12 October – Sun 18 October 2026
All week numbers
Week numbers right in your calendar
Miracal can show the week number next to your events from iCloud, Google and Outlook – together with your tasks and birthdays. Free for iPhone and Android.
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Frequently asked questions
How are week numbers counted?
According to ISO 8601: a week runs from Monday to Sunday, and week 1 is the week containing the first Thursday of the year – which is always the week with 4 January.
Why do some years have 53 weeks?
A year has 53 ISO weeks if it starts on a Thursday, or if it's a leap year that starts on a Wednesday. 2026 is such a year.
Can I show week numbers in my calendar?
Yes. In Miracal, switch on week numbers in the calendar settings and they appear in the week view. Apple Calendar and Google Calendar have a similar setting.