Preserve the zero of a zero-padded month in the path structure
Preserve the zero of a zero-padded month in the path structure

Without these changes the articles would go into 2011/05/11/x while the
relevant archive would be in 2011/5/index.html which makes no sense.

azbshiri/rstblog,oddbird/rstblog,azbshiri/rstblog,oddbird/rstblog,mitsuhiko/rstblog