mbostock/d3 — pull request #707 by jasondavies (2012-07-10 15:41:28+00:00)
Title: Convert 2-digit years according to POSIX.

This is also the convention used by Python 1.5.2+. Values 69-99 are mapped to 1969-1999, and values 0–68 are mapped to 2000–2068.