December 18 in strange history
What happened on December 18 in the world of UFOs, monsters and mysteries, plus 34 Canadian UFO sightings.
No famous case or old newspaper story we know of is dated December 18. Yet. Seen something on this date? Report it.
Canadian UFO sightings on December 18
The Canadian UFO Survey logged 34 sightings on December 18 between 1989 and today, most in 2025 (5). Most came from Quebec, Ontario, British Columbia.
The strangest ones
- 2010 · Dieppe, New Brunswick · Daylight disc
About 300 feet in air, shiny object. Disappeared - 2015 · Winnipeg, Manitoba · Daylight disc
Four circles of light show up in photos of the sun - 2005 · Calgary, Alberta · Daylight disc
Cross-shaped object seen visually, caught in digital image - 1992 · Lac La Hache, British Columbia · Close encounter with beings, 1800 witnesses
3 entities seen by child - 2025 · Marshfield, Prince Edward Island · Daylight disc, 2 witnesses
- 2025 · Bedford, Prince Edward Island · Physical traces, 3 witnesses
Source: the Canadian UFO Survey, Ufology Research. Explore every Canadian sighting.
The US Air Force opened 617 Project Blue Book files for sightings in December, 1947 to 1969. Browse the Air Force files.