[tz] Ethiopia local time
eggert at cs.ucla.edu
Wed Sep 12 22:51:19 UTC 2018
On 9/12/18 3:42 PM, Steven R. Loomis wrote:
> CLDR is tracking this issue at
> https://unicode.org/cldr/trac/ticket/9716 — my current thinking is to
> have something called a "time cycle", but it would be applied on top
> of the time zone calculation. Supporting it if it were UTC-3 has
> other problems.
> I think it should be considered a localization and not a time zone issue.
That makes sense. It's a clearer way to address the issue, and I do see
the resemblance to the issue of Japanese times that go past 24:00.
My understanding, by the way, is that it's not as simple as saying that
06:00 western time is equivalent to 00:00 Ethiopian time the same day,
and that Western and Ethiopian clocks tick at the same rate. Although
that is common practice in business in the major cities (and no doubt
cell phones have a lot to do with this), it's an approximation of a
tradition that is also mentioned in Mortada's PRI story, which is that
each day and night is divided into 12 equal hours, and that summer days
and winter nights have longer hours. Ethiopia is close enough to the
equator that the modern business approximation is reasonably close, but
it is just an approximation. Before cell phones became ubiquitous, as I
undertand it, people set their watches to 12 o'clock at dawn: although
this is a better approximation to tradition than the simpler "subtract 6
hours" method used with cell phones, it's still just an approximation.
Just to make things more interesting, I've also been told that some
people in Ethiopia set their watches to 6 o'clock at dawn, which would
be yet another compromise between traditional and Western timekeeping.
Sorry, I don't know the details about this (e.g., is it done only in
some regions, or is it more an ethnic-group thing?).
If you have a cell phone, there are apps that will display Ethiopian
business time, and to some extent these can fill in for CLDR and/or
tzdb. I don't know if these apps agree about the timekeeping details,
though (such as exactly when the date ticks over). See:
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