Fix sprint dates on homepage
Fix sprint dates on homepage

njl/pycon,njl/pycon,Diwahars/pycon,njl/pycon,Diwahars/pycon,PyCon/pycon,PyCon/pycon,PyCon/pycon,PyCon/pycon,njl/pycon,Diwahars/pycon,Diwahars/pycon