They’re easy to confuse.
An event happens at date certain, then it’s over, nothing more to be done.
A journey might include an event, but it’s bigger than that, and ongoing.
A wedding is an event, a marriage is a journey.
The week a book is published is an event, while the creation, publication and lifespan of the ideas in the book are a journey.
The focus and energy we lavish on events can easily distract us from the journeys we care about.