TryGhost/Ghost — pull request #2039 by hadrienl (2014-01-26 12:22:34+00:00)
Title: Fix : redirect to correct slug when switching between  param and keep 30...

...1 instead of losing SEO

If I have old post without date indexed, then I tell in configuration I want dates, so when I access the old URL without date, I will be redirected to the one with date.