William "Chops" Westfield wrote:

> On May 21, 2011, at 7:13 AM, Gerhard Fiedler wrote:
>=20
>>> You can't predict DST changes in advance without a crystal ball.

FWIW, I didn't write this, but I agree with it.
=20
> When is it actually important to know the DST status of timestamps
> that are in the past?

Whenever you have a UTC timestamp that you want to transform into a
local timestamp. Timestamps usually are in the past... :)

There are a number of good reasons why you may want to know the exact
(local) time when something happened in the past.

Gerhard
--=20
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