1. On April 15, 1912, the Titanic disaster was being reported in Alaska newspapers. The disaster sent shockwaves all around the world, but even in Alaska, people were actively following the news and discussing the tragedy.

2. April 15, 1944, marked the first Alaska Fish and Wildlife Service Migratory Bird Symposium in Anchorage. This symposium brought together notable conservationists and biologists to discuss the preservation of migratory bird populations in Alaska.

3. April 15, 1964, was the day of the great Alaska earthquake. This earthquake was the most destructive in U.S. history and caused immense damage across the state. It measured 9.2 on the Richter scale and caused massive landslides, tsunamis, and even a newly-formed island.

4. In 1971, April 15 was the deadline for claiming land under the provisions of the Alaska Native Claims Settlement Act. This act provided compensation and land allotments to indigenous Alaskan communities, and the deadline marked a historic moment in the state's history.

5. On April 15, 1995, Denali National Park and Preserve celebrated its 75th anniversary. The park was established on February 26, 1917, as Mount McKinley National Park but was later renamed in 1980 to reflect the Native Athabascan name for the mountain. The park is home to some of the state's most iconic landscapes and wildlife.