March 31st
11 documented paranormal events occurred on this day, spanning 1848 to 2026. Browse hauntings, UFO sightings, cryptid encounters, and unexplained phenomena recorded throughout history.
Featured cases
AARO 2026 Annual Report: 1,800 Cases and the Quiet Persistence of the Unresolved
Washington D.C., USA
The Pentagon's All-domain Anomaly Resolution Office released its 2026 annual report on March 31, disclosing roughly 1,800 cumulative case files and a stubborn residue of incidents that resist any prosaic explanation.
Iraq Military UAP Encounter (2023) — Mission Report
Iraq
A 2023 U.S. military mission report details an unidentified object sighting in Iraq, released via the PURSCO program in 2026.
AAWSAP DIRD: Biosensors and BioMEMS: A Survey of the Present Field, March 31, 2010 — Department of War Research Paper
Las Vegas, Nevada
This DIRD surveys biosensors and BioMEMS, a broad class of miniature biomedical devices that combine microscale engineering with sensing, fluid handling, stimulation, or drug-delivery functions. The report reviews major application areas including implantable blood-chemistry sensors, neural…
AAWSAP DIRD: State of the Art and Evolution of High-Energy Lasers, March 31, 2010 — Department of War Research Paper
Las Vegas, Nevada
This DIRD surveys the development of high-energy laser weapons and notes that, although lasers had already become important military tools for ranging, guidance, and other lower-power uses, true weapon-class systems remained limited by power generation, beam control, atmospheric propagation, and…
The Cosford-Shawbury UFO Incident
Shropshire to Devon, England
A massive triangular craft was tracked across England by RAF personnel.
Milan, England UFO Sighting (March 31, 1950) — FBI Files
Milan, England
U.S. government investigators recorded a flying disc sighting over Milan, England, in 1950, which was later identified as a rocket-powered hoax.
Every event recorded on this day
- 2026 UFO AARO 2026 Annual Report: 1,800 Cases and the Quiet Persistence of the Unresolved Washington D.C., USA
- 2023 UFO Iraq Military UAP Encounter (2023) — Mission Report Iraq
- 2010 UFO AAWSAP DIRD: Biosensors and BioMEMS: A Survey of the Present Field, March 31, 2010 — Department of War Research Paper Las Vegas, Nevada
- 2010 UFO AAWSAP DIRD: State of the Art and Evolution of High-Energy Lasers, March 31, 2010 — Department of War Research Paper Las Vegas, Nevada
- 1993 UFO The Cosford-Shawbury UFO Incident Shropshire to Devon, England
- 1950 UFO Milan, England UFO Sighting (March 31, 1950) — FBI Files Milan, England
- 1949 UFO Killeen Base, Texas UFO Sighting (March 31, 1949) — FBI Files Killeen Base, Texas
- 1922 Other Hinterkaifeck Murders Bavaria, Germany
- 1922 Other The Hinterkaifeck Murders Hinterkaifeck, Bavaria, Germany
- 1848 Haunting Hydesville Rappings Hydesville, New York, USA
- 1848 Other The Fox Sisters and Birth of Spiritualism Hydesville, New York, USA