On This Day, May 12
- 2024: Middle/End of the May 2024 Solar Storms, the most powerful set of Geomagnetic storms since the 2003 Halloween solar storms.
- 2018: Paris knife attack: A man is fatally shot by police in Paris after killing one and injuring several others.
- 2017: The WannaCry ransomware attack impacts over 400,000 computers worldwide, targeting computers of the United Kingdom's National Health Services and Telefónica computers.
- 2015: A train derailment in Philadelphia, United States, kills eight people and injures more than 200.
- 2015: Massive Nepal earthquake kills 218 people and injures more than 3,500.