時期に

at this time

→ 時期
phrase Rare #26,508
at this time Refers to a particular period or season, often translated as “at this time of year” or “during this period.” The に marks the time when something happens.
JA: この時期に桜が見られるのは珍しい。
EN: It's unusual to see cherry blossoms at this time of year.

首相は早い時期に選挙を行う可能性があるとほのめかした

The prime minister hinted that an early election might be held.

彼らはできるだけ早い時期に結婚したいと思った

They wanted to get married as soon as possible.

レポート課題適切な時期に告知します

The report assignment will be announced at the appropriate time.