Onor.io
Timex Oddity
A colleague spotted an odd thing that neither of us can figure out:
iex(1)> Timex.timezone(“America/Chicago”, {2015,4,12})
#<TimezoneInfo(America/Chicago - CDT (-05:00:00))>
iex(2)> Timex.timezone(“America/Chicago”, {2015,1,12})
#<TimezoneInfo(America/Chicago - CST (-06:00:00))>
I would have expected all calls to timezone in Chicago to be -06:00:00. Is the difference due to Daylight Savings Time or something else?
Marked As Solved
jerdew
DST is probably the cause, but it could possibly be weirder things .. timezones are strange. you can set the timezone to a variable, and then examine its properties to see its local offset (offset_std) and when that offset is valid from/until:
iex> tz = Timex.timezone("America/Chicago", {2015,4,12})
iex> tz.offset_std
3600
iex> z = Timex.timezone("America/Chicago", {2015,1,12})
iex> tz.offset_std
0
iex> tz.from
{:sunday, {{2014, 11, 2}, {1, 0, 0}}}
iex> tz.until
{:sunday, {{2015, 3, 8}, {2, 0, 0}}}
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