The words of Willie Nelson, the Texas philosopher, provide comfort in the third week of trains, shuttle buses and the same hotel room. "Hello, Walls" is an appropriate bedtime meditation. "Three Days," another Nelson classic, includes a refrain on the days he hates to see arrive: yesterday, today and tomorrow. Willie was writing about lost love; the song resonates because of lingering difficulties adapting to the international date line. It's yesterday in Baltimore, today in Sydney and we may be writing for tomorrow's Sun. Sometimes. Every hour on the hour, a confused man or woman at one of the myriad media workrooms turns to a familiar face and asks, "What day is it?" A Spanish radio announcer informs his audience that he is "coming to you from the future." I have seen the future, and it is confusing.