hmmm, now 7:30 am Pearl time (GMT -10), 3:30 am local time (GMT +10), but the eastern horizon is noticeably lighter...
From what I found, Truk was at GMT +10 the entire war, but Honolulu was at GMT-10h30 pre-war, switched to DST on feb.9, 1942 (GMT -9h30) for the rest of the war and only switched to its current time zone in 1947, so I still have no idea how to calculate local time.
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