44 FR 55575, 1979-09-27 Effective 1980-04-27 02:00 PST (the moment Daylight Savings Time begins), Juneau, Alaska and a portion of the surrounding area will move from the Pacific to the Yukon zone. (The effect will be that clocks in the Juneau area will not have to be changed.) This change was in response to a formal petition from the assembly of the city and borough of Juneau. 45 FR 25065, 1980-04-14 Editorial corrections to the new text and conforming changes to other impacted sections. The text of 49 CFR 71.10a appearing here is the "final" definition of the new boundary between Yukon and Pacific time. Many of the landmarks are anonymous ("thence northwesterly approximately 11 miles, to a mountain with an elevation of 2,775 feet"). The bottom line is, not all of the Pacific zone in Alaska is affected by what happened to Juneau. You'd need to add a zone. 45 FR 63494, 1980-09-25 "On Friday, March 28, 1980, a special election was held in Juneau concerning the time zone decision. By a vote of approximately 2 to 1 (2,933 to 1,579) a proposition was passed that amended the Juneau City Charter to restrict the Assembly's authority to act in matters concerning time zones and to require the Assembly to ask the Department to reconsider its decision to move Juneau from the Pacific to the Yukon time zone." "On May 5, 1980 the Department denied the petition for reconsideration...." [... scenes of a violent nature redacted ...] "Based on the evidence presented to the Department, we have determined that the convenience of commerce would best be served by returning Juneau and the surrounding area to the observation of Pacific time." Effective 1980-10-26 02:00 YDT (the moment Daylight Savings Time ends), Juneau, Alaska and a portion of the surrounding area will move back to the Pacific zone. (The effect will be that clocks in the Juneau area will again not have to be changed.) The following text suggests that at least some people in Juneau did observe the change to Yukon time: "The majority of commenters stated that dividing the southeastern part of the State into two time zones had caused a great deal of confusion and had adversely affected commerce. Commenters indicated that the change disrupted various aspects of the transportation and communications network that ties southeastern Alaska together. Many commenters focused upon the particular confusion caused to the tourist and fishing industries in this area." Other notes: I obtained 49 CFR 71 as it appeared in 1969 and verified that the time zone boundaries in Alaska were substantively identical to those in the 1982 CFR. The differences in the text are all editorial. I examined 49 CFR for 1965 (before the Department of Transportation supplanted the Interstate Commerce Commission) but was unable to locate any reference to time zones. Regards, DWF