1969 (MCMLXIX) was a common year starting on Wednesday of the Gregorian calendar, the 1969th year of the Common Era (CE) and Anno Domini (AD) designations, the 969th year of the 2nd millennium, the 69th year of the 20th century, and the 10th and last year of the 1960s decade.
This test is code-named Project Milrow, the 11th test of the Operation Mandrel 1969–1970 underground nuclear test series. This test is known as a "calibration shot" to test if the island is fit for larger underground nuclear detonations.