May 2, 2007
7 a.m.
Howland Island was observing UTC-10:30 at its most famous moment in history, which is when Amelia Earhart and Fred Noonan missed it and were never heard of again. My source for this is page 206 of the following reference: Elgen M. Long and Marie K. Long Amelia Earhart: the Mystery Solved Simon & Schuster (2000) So it appears that Howland Island observed Hawaii Standard Time during the brief period that it was inhabited during the 20th century. Since Baker was colonized by the same effort, I'd say they both observed Hawaii Time during the entire period of colonization (1935-1945?). These islands were also occupied by guano miners in the 19th century; I have no data about that.