Old Langsyn

The scent of wood smoke on a january morning ald lang sin. I'd always loved that song, which at first puzzled me with its lyrics. Should old acquaintance be forgot and never brought to mind? It was a song often sung by friends at the end of the year so it felt like a resounding no should follow that line. The answer came in the chorus, if you knew the translation for old langsyn, my dear, for old time's sake.