Bar charts with dates as X axis?

Hello,

I am trying to construct a plot that is a barchart with the X-axis being
dates. I have used the plot_dates to generated line plots that look
great, however, other than turning the dates into integers myself I cannot
figure out a way to do a barchart with dates as the Xaxis.

Has anyone done one of these - I am using the wxPython backend, if that
matters.

Thanks!

Hubert Hickman