1. In 1913, the New Jersey State Legislature passed a law prohibiting the sale of cigarettes to minors under the age of 18. This was one of the first laws of its kind in the United States.

2. On May 2, 1932, the first electric power plant in the United States to be built entirely underground was put into operation in Trenton, New Jersey. The plant, owned by Public Service Electric and Gas Company, was built beneath the streets of the city to save space and reduce noise pollution.

3. New Jersey Governor Richard J. Hughes signed the state's first anti-pollution law on May 2, 1961. The law required companies to obtain permits before discharging pollutants into the air and water, and it established penalties for violations.

4. The first municipal parking garage in the United States opened on May 2, 1949, in Hoboken, New Jersey. The garage, which had space for 1,200 cars, was built to alleviate parking congestion in the city.

5. On May 2, 1983, the New Jersey Devils played their first playoff game in franchise history. The team, which had moved to New Jersey from Colorado just two years earlier, lost to the New York Islanders in the first round of the playoffs. However, the Devils went on to win three Stanley Cup championships in the following years.