Quick answer: subscribe to your Notion database feed in Apple Calendar using the iCloud account shared by your iPhone and Apple Watch. Once the subscribed calendar is enabled in the Watch app, Notion events appear in the Calendar app and complications like other Apple Calendar events.
Add the Notion feed to iCloud Calendar
Follow the current Notion to Apple Calendar guide to create the feed and subscribe. For the most reliable multi-device setup, add the subscription on Mac and choose iCloud as its location, or explicitly select iCloud as the account on iPhone.
Show the calendar on Apple Watch
- Open the Watch app on iPhone.
- Open Calendar and choose Mirror my iPhone, or use Custom to enable the subscribed calendar.
- Open Calendar on Apple Watch and check that the feed is selected.
- Add a Calendar complication if you want the next event on the watch face.
Apple Watch mirrors Apple Calendar data; it does not connect to Notion directly. Make date changes in Notion and allow the feed plus Apple's calendar sync to refresh.
If events do not appear
- Confirm the subscription is stored in iCloud rather than only On My iPhone.
- In the Watch app, verify the subscribed calendar is included under Custom calendar settings.
- Check that the Notion row has a value in the feed's selected date field.
- Open Apple Calendar on iPhone first to confirm the event has reached the phone.
Calendar notifications follow the alert settings of the subscribed calendar and Apple's notification rules. The feed itself does not force an alert time.