Thanks for the picture and the link.
If I read it correctly, the international dateline goes between the 2 islands.
Help out here:
If it is 8:00 am Monday on our island, what time & day is it on the Russian island?
I think 7 AM on Tuesday. But I’m not sure.
In some regards, it's easier to think of the IDL not as line on the earth, but rather a fixed line under which the earth rotates...in other words, since the earth rotates from West to East, the Russian Islands would have passed under the IDL 23 hours earlier, making it 7:00 a.m. Tuesday there.
I've taken a lot of trans-Pacific flights in my lifetime. Typically, they leave Tokyo or Osaka around 6 p.m. and arrive in our west coast gateways (LA, San Francisco or Seattle) at around 10 a.m. on the same day. If you take one of these flights in the summer, you are actually flying into the rising sun for much of the trip.
Pearl Harbor was attacked on Monday, December 8 Tokyo time, I think around 3 a.m., but about 7 a.m., December 7 in Hawaii.