期日|きじつkijitsu[1]atamadaka (head-high)

1. nounfixed date; appointed date; set date
2. noundeadline; due date
   お支払しはらいの期日きじつを二にヶ月かげつ間かん延長えんちょうしていただけませんでしょうか。↗

   May we therefore ask you for a two months' extension of credit?

• Synonym締め切り日しめきりびNeutralThe day by which something must be finished, with the focus on the cutoff. 「期日」 is broader: any date fixed in advance, including due dates.
• Synonym日取りひどりNeutralThe date chosen for an event, as in 「結婚式の日取り」; the nuance is picking the day. 「期日」 is a date set by prior agreement.
• Synonym期限きげんNeutralA time limit or term, stressing a span of time or the cutoff point. 「期日」 refers to one specific day.
• SynonymデッドラインNeutralLoanword for a final deadline, carrying a sense of urgency and used mostly for work tasks. 「期日」 is a specific agreed-upon date.
• Related締め切りしめきりNeutralThe cutoff or submission deadline, as in 「締め切りに追われる」; it stresses the time limit, while 「期日」 stresses the date itself.
• Related開催日かいさいびNeutralThe date on which an event is held, with the focus on staging it. It does not cover deadlines or due dates such as payment dates.

Use 「期日」 for dates fixed by agreement or rule, as in 「支払期日」; it can also mean a due date. For work deadlines say 「締め切り」, for time limits 「期限」, for choosing a day 「日取り」, and for an event's date 「開催日」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. ある行為こういをその時ときにするよう前まえもってきめられた日時にちじ。