for old times' sake
US /fɔr oʊld taɪmz seɪk/
UK /fɔr oʊld taɪmz seɪk/

1.
为了旧时光, 为了纪念过去
because of sentimental memory of the past
:
•
Let's visit our old school for old times' sake.
让我们为了旧时光去看看我们的老学校吧。
•
He kept the old broken watch for old times' sake.
他保留着那块旧的坏手表,为了旧时光。