DST and datetime

[Lawrence D'Oliveiro]

In message <874on82oan.fsf at benfinney.id.au>, Ben Finney wrote:

> Or you could use the ready-made wheel maintained by others:
> 
>     tzinfo Objects
>     <URL:http://docs.python.org/library/datetime.html#tzinfo-objects>

But that’s only an abstract base class, which means it doesn’t actually 
implement any reading of actual timezone info.

>     World timezone definitions, modern and historical
>     <URL:http://pypi.python.org/pypi/pytz>

Shame that they maintain their own duplicate of the Olson database, instead 
of reading the original directly from /usr/share/zoneinfo 
<http://www.codecodex.com/wiki/Reading_time_zone_files>.