IANA time zone database - cutoff date
This page is related to the page IANA time zone database.
Alan Barret 2013-09-19 09:05:08 http://mm.icann.org/pipermail/tz/2013-September/020290.html
In the short term, I think that the tz project should stick to the existing practice of using 1970 as a cutoff date.
In the long term, think that the tz project should attempt to provide as much high-quality data as is reasonably feasible