    - test tzoffset
    - make more tests (see Devel::Cover)
    - clean up xs
    - benchmark 1.29 against current
    - allow cdate() to print as different formats
    - Document format flags that don't work everywhere (see comments in *.t files)
    - move strptime() from XS to pure perl. See DateTime::Format::Strptime for a complicated example 

