Dutch Harbor Remembrance Day is established on June 3 of each year to commemorate the attack on Dutch Harbor on June 3, 1942, and to honor the individuals who died as a result of the attack and those inhabitants of Attu and Kiska who fell into enemy hands three days later and were held captive in Japan until the end of World War II. On Dutch Harbor Remembrance Day the many servicemen who died in 1943 while recapturing Attu and Kiska from the Japanese are also honored for their diligent service to the United States and to the state. The governor shall issue a proclamation to commemorate Dutch Harbor Remembrance Day and shall direct that the Alaska flag be flown at half-mast on that day. The day may be observed by suitable observances and exercises by civic groups and the public.