[tz] Java & Rearguard

[Steve Summit]

Paul Eggert wrote:
> On 6/4/19 4:39 AM, John Wilcock wrote:
> > are there any examples of negative DST other than Ireland? 
>
> In addition to Ireland (starting 1971), tzdb also reports Morocco 
> (starting 2019), Namibia (1994-2017), and Czechoslovakia (1946-1947).

For what it's worth, I've just discovered a Wikipedia article on
this topic:

	https://en.wikipedia.org/wiki/Winter_time_(clock_lag)

It lists three of Paul's examples, and also Chile.  It defines
Winter Time as "the practice of shifting the clock back (compared
to the standard time) during winter months", and describes it as
"a form of daylight saving time which is the opposite compensation
to the summer time."  And it does cite some references which might
be relevant to this discussion.