1. On July 18, 1866, the first telegraph line was introduced to Hawaii. The line connected Honolulu to San Francisco, California, and allowed for much faster communication between the two regions than was previously possible.

2. In 1959, Hawaii was officially admitted as the 50th state of the United States on July 18. This date is still celebrated today as Statehood Day in Hawaii.

3. On July 18, 1947, a massive tsunami struck Hilo, causing widespread devastation and claiming the lives of over 150 people. The disaster was a major turning point in Hawaii's history, leading to increased awareness and preparation for future natural disasters.

4. The traditional Hawaiian holiday of Lonoikamakahiki is celebrated on July 18. This holiday honors the god Lono, who was associated with fertility, agriculture, and rain. It is said that Lono's arrival was marked by clouds and rain, which were considered to be signs of his blessing.

5. On July 18, 1968, the Hawaii Five-O television series premiered. The show, which was set and filmed in Hawaii, ran for 12 seasons and introduced viewers to the beauty and culture of the islands. The iconic theme song, composed by Morton Stevens, is still recognized around the world.