May 27 in strange history

What happened on May 27 in the world of UFOs, monsters and mysteries, plus 44 Canadian UFO sightings.

No famous case or old newspaper story we know of is dated May 27. Yet. Seen something on this date? Report it.

Canadian UFO sightings on May 27

The Canadian UFO Survey logged 44 sightings on May 27 between 1989 and today, most in 2019 (8). Most came from Quebec, Ontario, Manitoba.

2005 · Hamilton, Ontario · Close encounter
Low-flying light, then "faces of aliens" appeared in clouds
2007 · Dieppe, New Brunswick · Daylight disc, 2 witnesses
Shape-changing object moved against wind, pilot witness
2019 · Iqaluit, Nunavut · Daylight disc
"unmanned aerial vehicle (UAV) activity in close proximity to departing helicopter"
2025 · Laval, Quebec · Daylight disc
Photos: "Nobody sees what I see, I don't understand"
1991 · Brooks, Alberta · Daylight disc
High-alt. object flying W, white on outside, brown in middle
2017 · Saint Laurent, Quebec · Daylight disc, 2 witnesses
White round object remained stationary then left slowly

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.