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You could use Calendar on your iPhone or Mac.

It's a good thought, and one that should've worked, but for some reason the apple watch isn't giving me haptic alerts for calendar notifications.
 
It's a good thought, and one that should've worked, but for some reason the apple watch isn't giving me haptic alerts for calendar notifications.
iPhone: Companion App (Apple Watch): Notifications: Calendar: Custom (if your iPhone is not set for Calendar notifications).
 
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