Re: Time zones

Newsgroups	comp.soft-sys.math.maple
Date	2022-06-21 09:13 -0700
References	<e08bea44-59ad-4cf1-ac87-082b24ff742cn@googlegroups.com>
Message-ID	<70c79900-625b-44cf-ae82-1f443abb66fdn@googlegroups.com> (permalink)
Subject	Re: Time zones
From	acer <maple@rogers.com>

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On Thursday, June 16, 2022 at 9:17:51 PM UTC-4, jfh wrote:
> Wishing to use Date in my own time zone I tried 
> 
> > now:=Date(timezone="NZST"); 
> Error, (in Date:-ModuleCopy) unrecognised timezone: NZST 
> 
> Maple must have a list of acceptable time zone names. How does one find it? 
> Experimentation eventually found that at present the following works, though of course it will need changing in September when we start daylight saving., and back again in April 2023. 
> 
> > now:=Date(timezone="GMT+12:00"); 
> now := <Date: 2022-06-17T13:07:28 GMT+12:00>


Using the 2nd column here, ie. "TZ database name",
     https://en.wikipedia.org/wiki/List_of_tz_database_time_zones#List

restart;
with(Calendar):
d1:=Date(timezone="Pacific/Auckland");
       d1 := <Date: 2022-06-22T04:09:07 New Zealand Time>

d2:=Date(timezone="GMT+12:00")
          d2 := <Date: 2022-06-22T04:09:07 GMT+12:00>

DateDifference(Date(timezone="Pacific/Auckland"),
               Date(timezone="GMT+12:00"));
                               0

Format(d1);
                   "2022-06-21T12:09:07 EDT"

Format(d2);
                   "2022-06-21T12:09:07 EDT"

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Time zones jfh <harperjf2@gmail.com> - 2022-06-16 18:17 -0700
  Re: Time zones acer <maple@rogers.com> - 2022-06-21 09:13 -0700
    Re: Time zones jfh <harperjf2@gmail.com> - 2022-06-21 14:37 -0700
      Re: Time zones acer <maple@rogers.com> - 2022-06-21 15:01 -0700
        Re: Time zones acer <maple@rogers.com> - 2022-06-21 15:05 -0700

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