日々を

one's days

→ 日々
phrase Rare #20,563
one's days 日々 means “days” or “day-to-day life.” With を, it commonly appears before verbs such as 過ごす or 送る, meaning to spend or live one's days in a certain way.
JA: 毎日、充実した日々を過ごしています。
EN: I spend fulfilling days every day.

生涯あなたは孤独日々を過ごす

You will spend the rest of your life in solitude.

戦争中彼は多くの恐怖日々を経験しました

He went through many terrifying days during the war.

ぶらぶら遊んで若い日々を無駄に過ごすのをやめるべき時だ

It’s time to stop fooling around and wasting your youth.

彼女はそこで過ごした不幸な日々をくよくよ考えていた

She brooded over the unhappy days she had spent there.

あなたが私を受け入れてくれなければ––悲惨な日々を送っていただろう

If you hadn't accepted me, I would have spent my days in misery.

— どん底作家の人生に幸あれ! (2019)