Today the reported period is based on FULL MONTH date only.
It would be great to be able to select a FROM and TO dates as well.
I just made this feature available by patching awstats.pl.
The screenshot of the result: http://tfeserver.be/downloadhtml/patch_awstats_interval_dates/awstats_interval1.png
The patch: http://tfeserver.be/downloadhtml/patch_awstats_interval_dates/patch_awstats.patch
This is the first patch i propose here, so sorry if i'm doing something wrong.
TODO: (and upcoming) patch the file tools/awstats_buildstaticpages.pl to generate static html files with date ranges to.