On Thu, Sep 24, 2015 at 8:44 AM, Alexander Belopolsky <alexander.belopolsky@gmail.com> wrote:

In any case, TZ data before 1970 is highly suspect so we will probably do our users a favor by assuming standard time and letting those with historical timeseries figure out the transitions by themselves.

Yeah. Originally I made a boolean to suppress pre-1970 data, before settling on the arbitrary starting year option. I expect that 1970 will be the most common year to use as the base. FWIW: https://github.com/abalkin/cpython/pull/1 ChrisA