I think you are mistaken, it was Stephen Hawking.
Here is an article about it:
https://vinepair.com/articles/stephen-hawking-time-travel-party/No one attended.
The invite for the party was published in newspapers the day after the event.
This was the first time a party for time travelers was documented in history.
However, it was wiped from the digital internet and replaced with the digital era story of Hawking replicating the Einstein experiment with similar results.
Yes, it was Hawking not Einstein. I traveled to alleged Einsteins party and it was empty.