I agree about 'yesternight', though I would go further and say that it is incorrect in modern English. 'Yesterday night' is uncommon, but not strange, in my opinion.
I agree about 'yesternight', though I would go further and say that it is incorrect in modern English. 'Yesterday night' is uncommon, but not strange, in my opinion.
Fair point, though it doesn't make much sense. "Yesternight" at least matches the construction of "yesterday" but "yesterday night" always sounds oddly wordy to me. But yes, "yesternight" doesn't fit modern English usage at all.