I graduated from Vallejo High School in 1979, while living on Mare Island Naval Ship Yard. Now the base is gone, and Vallejo is crime-ridden. But, yes, Travis and that area were nice. I started in the AF Reserves there.
No, the International Date Line is in the Pacific Ocean at 180 degrees. When you cross that line going west, it becomes the next day. My wife is in Thailand right now. It is 3:24 p.m. on Thursday here, but it is 4:24 a.m. on Friday there.