One of the strangest Christmas Eve's I ever experienced was in Perth, Western Australia.
I was on USS Carl Vinson and we were making a port call during Christmas. I checked into a nice hotel and spent the afternoon sunbathing on a mostly deserted deck by the rooftop pool. At some point, there was a bit of excitement from across the pool but I didn't bother myself to investigate. Then, someone took occupancy of a deck chair near mine.
For the next hour, I was sunning beside Pat Boone who was in town doing a concert. Circa 1986, as I recall.