1. In 1893, a group of American businessmen, in conjunction with U.S. Marines, overthrew Queen Liliuokalani, the last monarch of Hawaii, on January 31. This event led to the annexation of Hawaii by the United States.

2. On January 31, 1929, the SS Malolo, a luxury ocean liner owned and operated by the Matson Navigation Company, made its maiden voyage from San Francisco to Honolulu. The ship was known for its speed and comfort and played an important role in the tourism industry in Hawaii.

3. In 1941, on January 31, the U.S. military began construction on Hickam Field, a military base located near Pearl Harbor. The base was named after Lieutenant Colonel Horace Meek Hickam, who was killed during the attack on Pearl Harbor on December 7, 1941.

4. On January 31, 1959, Hawaii officially became the 50th state in the United States. This followed a long period of controversy and debate about Hawaii's status as a U.S. territory and its right to statehood.

5. In 2018, on January 31, lava from the Kilauea volcano on Hawaii's Big Island began to erupt, causing widespread destruction and forcing thousands of people to evacuate their homes. The eruption lasted for several months and was one of the most significant volcanic events in Hawaii's history.