“On 28 June 2009, Professor #StephenHawking held a party at the University of Cambridge specifically for time-travellers, with Krug champagne and hors d’oeuvres. In order to prevent frauds from attending, the renowned theoretical physicist only announced the party after it had finished. Sadly, no one turned up.”
https://www.theguardian.com/tv-and-radio/2020/aug/08/facts-entertainment-16-fascinating-things-weve-learned-from-podcasts