The data are from
https://www.timeanddate.com/time/zones/ and were
hand-edited to develop this code, so there may be errors. Also, note that
some of these contradict; if you examine the code, you'll see some
commented-out portions that represent solving conflicting definitions by
choosing the more common timezone abbreviation over a the less common one.
GMTOffsetFromTz(tz)Number of hours in offset, e.g. AST yields 4.
a timezone, e.g. UTC.
Dan Kelley
library(oce)
cat("Atlantic Standard Time is ", GMTOffsetFromTz("AST"), "hours after UTC")
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