Final answer:
In H.G. Wells's 'The Time Machine,' the first event that occurs is the Time Traveler hosting a demonstration of his model time machine to his friends.
Step-by-step explanation:
The events mentioned are from H.G. Wells's famous science fiction novel, 'The Time Machine.' In this novel, the sequence of events begins with the Time Traveler hosting a demonstration of his model time machine to a group of friends. This is the first key event in the story where he introduces the concept of time travel. The other events listed occur subsequently as the Time Traveler journeys to the future and experiences the world of tomorrow. Therefore, the first event that happened in the book is the Time Traveler hosting a demonstration of a model time machine.