May 18 in strange history

What happened on May 18 in the world of UFOs, monsters and mysteries, plus 59 Canadian UFO sightings.

No famous case or old newspaper story we know of is dated May 18. Yet. Seen something on this date? Report it.

Canadian UFO sightings on May 18

The Canadian UFO Survey logged 59 sightings on May 18 between 1989 and today, most in 2009 (6). Most came from British Columbia, Quebec, Ontario.

2000 · Sorrento, British Columbia · Close encounter with beings
Observed small object fly away. Later had memories of "aliens".
2009 · Okanagan Lake, British Columbia · Daylight disc
White plastic looking object , no sound or vapor trail in sky
2007 · Kelowna, British Columbia · Daylight disc
Object like "Tupperware lid" flew N over lake
2009 · Toronto, Ontario · Daylight disc
Photo on youtube of a jetstream
2010 · Penticton, British Columbia · Daylight disc
Still from video shows odd light
1998 · Berthierville, Quebec · Physical traces
Took picture of a triangular formation of lights

Source: the Canadian UFO Survey, Ufology Research. Explore every Canadian sighting.

The US Air Force opened 758 Project Blue Book files for sightings in May, 1947 to 1969. Browse the Air Force files.