NJ designated March 31 of each year Thomas Mundy Peterson Day in recognition of his historic vote on March 31. Thomas Mundy Peterson (October 6, 1824 – February 4, 1904) of Perth Amboy, New Jersey was the first African-American to vote in an election under the just-enacted provisions of the 15th Amendment to the United States Constitution. His vote was cast on March 31, 1870.