"That day's studying wasn't finished so it was carried over to the following day."
"That day's studying wasn't finished so it was carried over to the following day."
"that day's" 「その日の〜」
"studying" 「勉強」この場合 "work" も言えます。
"wasn't finished" 「終わらない」
"so it was carried over to ~" 「〜に持ち越す」
"the following day" 「次の日」"the next day" も使えます。