Cannot PyDatetimeConverter(Eastern)

Following the docstring of matplotlib.dates, I tried the

    > following commands, but failed. It says there is no argument
    > needed when constructing PyDatetimeConverter object. If it
    > is true, how about correcting it right away because the
    > document is only one explaining its usage?

Done, thanks.

Early versions of the datetime converter supported time zones, but
there were problems in the implementation and I removed the feature.
The doc string was out of date.