"The UTC time zone is sometimes denoted by the letter Z since the equivalent nautical time zone (GMT) has been denoted by Z since about 1950, and by a "zone description" of zero hours since 1920. See time zone history. Since the NATO phonetic alphabet and amateur radio word for Z is "Zulu", UT is sometimes known as Zulu time. UTC+1 is Alpha time, UTC+2 is Bravo time, and so on."
From Wikipedia.
So sue me...I cheated.
Greg