[tz] Irish Standard Time vs Irish Summer Time

Brian Inglis Brian.Inglis at SystematicSw.ab.ca
Sat Jan 20 06:25:43 UTC 2018

On 2018-01-19 18:39, Joseph Myers wrote:
> On Fri, 19 Jan 2018, Robert Elz wrote:
>> "Standard" time is simply the time that is agreed it is *now* (at any 
>> time of the year) - that's what it means to be a standard.
> That's essentially why I think tm_isdst should be based on something other 
> than the notion of one time offset being standard and another being a variant
> on that. The laws establishing time offsets have the function of determining
> the offset applicable for legal purposes at any given time, not the function
> of determining tm_isdst. Just because the law happens to be worded as "the
> offset is X, except at these times when it's Y", or to give a name involving
> "standard time" to one choice of offset, should not be considered of semantic
> significance; the law had to choose some part of the year to be X and some
> part to be Y, or if naming the offsets had to come up with different names
> for them, but the particular choice of which is X and which is Y is just an
> arbitrary choice in drafting the law.

Set when last transition increased offset, clear when last transition reduced

Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

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