Question

Which time zone is farthest east?

Answer 1

the first time zone west of the international date line.

Explanation:

The straight red line near the middle of this depiction is the prime meridian. All points to the west of the prime meridian and continuing on to the solid red line on the far right of this picture, the international date line, are considered "west."

All time zones to the right of the prime meridian and continuing to the international date line are considered "east." That would make the first time zone to the right of the international date line the farthest east.