[LEAPSECS] Short notice for DST changes

Tony Finch dot at dotat.at
Mon Feb 24 08:24:53 EST 2014

Rob Seaman <seaman at noao.edu> wrote:


> It is not obvious why a couple of weeks notice is acceptable for hour

> amplitude clock adjustments,

It isn't. It's a stupid thing to do.

> Or for that matter why variable radix 25-hour or 23-hour days are ok for

> drifting timezones or other variations of the leap hour notion.

Daylight saving does not use variable radix in that way, nor does it use
intercalary insertions. The change in UTC offset is indicated either
explicitly or with a DST flag of some kind.

If UTC worked like time zones it would have a representation like
2014-02-24 12:34:56 -00:00:35

f.anthony.n.finch <dot at dotat.at> http://dotat.at/
Shannon: South veering west later, 7 to severe gale 9, occasionally storm 10,
perhaps violent storm 11 later. Very rough or high, occasionally very high.
Rain or squally showers. Moderate, occasionally poor.

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