Determine time offset from timezone

Description

The data are from http://www.timeanddate.com/library/abbreviations/timezones/ 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.

Usage

1
GMTOffsetFromTz(tz)

Arguments

tz

a timezone, e.g. UTC.

Value

Number of hours in offset, e.g. AST yields 4.

Author(s)

Dan Kelley

See Also

Other functions relating to time: decodeTime

Examples

1
2
library(oce)
cat("Atlantic Standard Time is ", GMTOffsetFromTz("AST"), "hours after UTC")

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