I understand what the sentence The house is a full day’s journey from here means, but I’m wondering what day’s is short for in this expression. It doesn’t match any pattern I know.
A couple of examples:
- He’s = he is
- Let’s = let us
- Mary’s car = the car belongs to Mary
- Day’s = it sounds to me like something belongs to a day and this is what I don’t understand. Shouldn’t it be The house is a full day of journey from here instead?