O'Day was born on March 11, 1870, in Titusville, Pennsylvania. His father, Daniel O'Day, was a director of the Standard Oil Company and a prominent factor in the petroleum business for forty years.
O'Day was born on March 11, 1870, in Titusville, Pennsylvania. His father, Daniel O'Day, held a key position at the Standard Oil Company and played a significant role in the petroleum industry for forty years.