I have some markdown files in my jekyll site that do not follow the yyyy-mm-dd date format convention. 'hugo import jekyll' will fail with this error message:

import_jekyll.go:390: Failed to parse filename '2012-7-8-p-26697918479.markdown': parsing time "2012-7-8": month out of range. Skipping

It is better if the import tool can be more flexible when it comes to handling date in the file name.