[Datetime-SIG] Computing .dst() as a timedelta
alexander.belopolsky at gmail.com
Wed Sep 23 04:16:07 CEST 2015
On Tue, Sep 22, 2015 at 8:57 PM, Chris Angelico <rosuav at gmail.com> wrote:
> [ Alexander Belopolsky] I bet people in Russia who know what
> Moscow time is outnumber those who know what UTC is at least 100 to 1. I
> > bet you will get a similar ratio in California between UTC and say
> > Standard Time.
> Of course. Local time is always better known than UTC.
Moscow Time is hardly local for Russian Anadyr or Petropavlovsk-Kamchatsky,
but people still use Moscow Time for train schedules there. In fact, those
places are closer to California than they are to Moscow.
> But any given local time is only going to be known in its own locality.
Depends on a locality. Local time at the village of Greenwich is fairly
> I would bet
> that the people in Russia who know Eastern Standard Time, or the
> people in California who know Moscow time, would be quite low.
I suspect that anyone who knows about UTC would know about both Moscow and
> > Let's have a show of hands here: how many people know what "C" stands
> for in
> > UTC and what "M" stands in GMT and what is the significance of these
> > letters?
> I know, on both counts, because I'm a wonk.
Well, in this case you know more than I do. I know that "M" stands for
"mean" (I've heard that on BBC:-) and that it has something to do with the
solar time, but I cannot tell you "mean" of what it is or whether BBC's
fifth beep comes on a UTC or GMT second.
> But those specifics are
> part of what I would elide, along with leap seconds and relativity,
> when explaining a scheduling system.
Right, but most people (myself included) only learn about UTC when they
learn about those complications. I would say in New York, Eastern Time is
for most people, EST is for nerds and UTC is for wonks.
(Let's face it - nobody's going
> to schedule a meeting to such accuracy that any of it will matter.)
> Time is a lot messier than most people need to care about.
Right. So let them use the time that their wall clocks are showing. When
a New Yorker calls Cupertino, they have three options: Eastern, Pacific and
UTC. The first two are a slight inconvenience for one of them and the
third is a major annoyance for both.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Datetime-SIG