when?
January 20, 1930
Buzz Aldrin
Edwin Eugene Aldrin Jr. was born on January 20, 1930, at Mountainside Hospital in Glen Ridge, New Jersey. 
who is the second person step on moon Buzz Aldrin where was he born? Glen Ridge, New Jersey, United States
wiki:13472512
Buzz Aldrin [SEP] Early life
Edwin Eugene Aldrin Jr. was born on January 20, 1930, at Mountainside Hospital in Glen Ridge, New Jersey. His parents, Edwin Eugene Aldrin Sr. and Marion Aldrin ( Moon), lived in neighboring Montclair. His father was an Army aviator during World War I and the assistant commandant of the Army's test pilot school at McCook Field, Ohio, from 1919 to 1922, but left the Army in 1928 and became an executive at Standard Oil. Aldrin had two siblings, both sisters: Madeleine, who was four years older, and Fay Ann, who was a year and a half older. His nickname, which became his legal first name in 1988, arose as a result of Fay's mispronouncing "brother" as "buzzer", which was then shortened to "Buzz".