Yes it is, and yes I would.
I guess that would be a line on which you would record data about the international date line.
the international date line
It would be Saturday. Monday
er, no. they do not. where Naruto comes from "dating" would not be the proper word.
east-bound
Yes, "Fourth of July" should be capitalized as it is a proper noun referring to the date of Independence Day in the United States.
Yes, a date is the name of a specific day; for example March 15, 1911.
no countries lies in international date line
It would be Monday.
it would be Thursday
Midnight.
The date. If it were Monday on the west side of the line, it would most likely still be Sunday on the east side.