Peter de Jager is a South African-born Canadian computer engineer, best known for his Y2K early 1990s outcry warning, and was the namesake of the de Jager Year 2000 index that began trading on the American Stock Exchange in 1997. De Jager co-authored "Countdown Y2K: Business Survival Planning for the Year 2000 and periodically writes for Canada's Municipal World magazine, focusing on Change Management.