1. In 1775, the Second Continental Congress convened in New York City, making May 10 the first day of the historic assembly.
2. On May 10, 1869, the final spike was driven into the transcontinental railroad at Promontory, Utah, linking New York City with the West Coast and marking a major milestone in American transportation.
3. In 1924, New York City's Holland Tunnel opened, connecting Manhattan with New Jersey below the Hudson River and easing traffic congestion between the two states.
4. May 10, 1970, marked the day of a protest at City Hall in New York City in response to the Kent State shootings, where unarmed student protesters were killed by the National Guard on a college campus in Ohio a few days earlier.
5. In 1983, the first official Mother's Day Rally for Peace was held in Central Park, New York City, where mothers who had lost children to violence rallied together to promote peace and nonviolence.