noun, adverb
ancient times; olden days
Refers to times long past; can be used as a noun or adverbially. Somewhat literary or formal in tone.
旧時の風習を今に伝える祭り。
A festival that passes down customs from ancient times to the present.
この地には旧時、大きな城があったという。
They say that in olden days, there was a large castle in this area.