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#!/usr/bin/env lua
require("posixtz")
print(posixtz.from_file("/usr/share/zoneinfo/Europe/Stockholm"))
t = posixtz.parse("CET-1CEST,M3.5.0,M10.5.0/3")
local out = ""
out = out .. "POSIX TZ: '"..t.std.."'\n"
out = out .. "GMT Offset, where positive is West of GMT: '"..t.offset.total.."'\n"
if t.dst then
out = out .. "DST zone is called '"..t.dst.name.."'\n"
local function dstinfo (pos)
local info = ""
if t.dst[pos].hour then
info = info .. "at '"..t.dst[pos].hour.."' hours (0-23) "
end
if t.dst[pos].week then
info = info .. "on weekday '"..t.dst[pos].weekday.."' "
info = info .. "of week '"..t.dst[pos].week.."' "
info = info .. "of the month '"..t.dst[pos].month.."'"
else
info = info .. "on day '"..t.dst[pos].day.."' "
info = info .. "of month '"..t.dst[pos].month.."'"
end
return info
end
out = out .. "DST begins "
out = out .. dstinfo("start") .. "\n"
out = out .. "DST ends "
out = out .. dstinfo("stop") .. "\n"
end
io.write(out)
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