https://en.wikipedia.org/wiki/Time_travel_claims_and_urban_legends

A photograph from 1941 of genuine authenticity of the re-opening of the South Fork Bridge in Gold Bridge, British Columbia is sometimes alleged on the internet to show a time traveler. It was claimed that his clothing and sunglasses were of the present day and not of the styles worn in the '40s, while his camera was anachronistically small.

Further research suggested that the present-day appearance of the man would not have necessarily been out of place in 1941. The style of sunglasses he is wearing first appeared in the 1920s. On first glance the man is taken by many to be wearing a printed T-shirt, but on closer inspection it seems to be a sweater with a sewn-on emblem, the kind of clothing often worn by sports teams of the period. The shirt resembles one that was used by the Montreal Maroons, an ice hockey team from that era. The remainder of his clothing would appear to have been available at the time, though his clothes are far more casual than those worn by the other individuals in the photograph. His camera is smaller than most of that era, but cameras of that size did exist; while it is unclear what make his camera was, Kodak had manufactured portable cameras of equivalent size since 1938.

The "Time Traveling Hipster" became a case study in viral Internet phenomena which was presented at the Museums and the Web 2011 conference in Philadelphia.