"I run on Thursdays."
Translation:Corro i giovedì.
Yes, but it's not translated literally in this case. :) The expression is "il giovedì" to imply "Thursdays", whereas if you just mean one Thursday, you just say "giovedì", without the article. E.g. "Il venerdì sera esco con gli amici" means: On Friday nights, I go out with friends. But "Venerdì sera esco con gli amici" means "On Friday night I'm going out with friends."