The contiguous United States contains how many time zones?
Time zone names. The names Eastern, Central, Mountain, and Pacific have been used for the four time zones of the 48 contiguous states since the beginning of standard time in the United States. Alaska used to have four time zones: Pacific, Yukon, Alaska, and Bering.ime zone names. The names Eastern, Central, Mountain, and Pacific have been used for the four time zones of the 48 contiguous states since the beginning of standard time in the United States. Alaska used to have four time zones: Pacific, Yukon, Alaska, and Bering.