iOS 9 Calendar teaser 001

Apple’s Calendar app for the iPhone, iPod touch, iPad and Mac does a fine job in helping organize your schedule and making your more productive.

Like many other people, I like to browse my calendars with week numbers enabled as this helps me better understand my events and tasks for the month.

The Calendar app does not show week numbers by default, but don’t you worry—this tutorial will teach you how to enable display of week numbers in your calendar views across iOS and OS X platforms.

How to show week numbers in Calendar for iPhone and iPad

1) Go to Settings → Mail, Contacts, Calendars.

2) Flip the switch labeled Week Numbers right underneath the Calendars heading to the ON position.

iOS 9 Calendars show week numbers iPhone screenshot 001

This will enable display of week numbers in the monthly calendar. Week numbers are not available in Day and Year views on Calendar for iOS.

How to show week numbers in Calendar for Mac

OS X El Capitan Calendar show week numbers Mac screenshot 001

1) Launch the Calendar app on your Mac.

2) Select Preferences in the Calendar menu.

3) Click the Advanced tab.

4) Tick the box next to “Show week numbers”.

how week number calendar on mac

This will enable week numbers in Calendar’s Week, Month and Year views.

OS X El Capitan Calendar show week numbers Mac screenshot 003

Despite the fact that week numbers are unavailable in the Calendar web app at, I like having that setting enabled on iOS and OS X.

At any rate, it’s far better to visually determine what week number of the year any date falls on than having to count the weeks manually like an animal.

If you like this tutorial, see how you can share calendars and disable calendar suggestions based on data found in Mail or browse our complete how-to archive.

Need help? Ask iDB!

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