時日|じじつjijitsu[1]atamadaka (head-high)

1. noundate; time

• Synonym日ひNeutralA day or days in the broadest sense, as in 「その日」; unlike 「時日」 it does not specifically mean the days something requires.
• Synonym月日がっぴNeutralMonth and day only, as in 「生年月日」; points to the date on the calendar, with no year included.
• Related日付ひづけNeutralThe date written on a letter or document — the year, month and day put down in writing. The everyday word for a date.
• Related期日きじつNeutralA date set in advance for something, such as a due date or deadline, as in 「支払い期日」.
• Related日時にちじNeutralDate and time taken together, as in 「会議の日時」; the emphasis is on the specific time. The usual word when arranging schedules.
• Related日取りひどりNeutralThe day chosen and settled on for an event, as in 「結婚式の日取り」; stresses the selected date itself.
• Related年月日ねんがっぴNeutralYear, month and day together; mostly seen when filling in forms, as in 「生年月日」.

For an everyday date say 「日付」; for arranging a date and time, 「日時」. 「時日」 belongs to written or formal prose and means the days or time required for something, as in 「時日を要する」. For deadlines use 「期日」, for a chosen day 「日取り」, and on forms 「年月日」.

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

1. 日数にっすう、月日つきひ。
2. 日ひにちと時間じかん。期日きじつ。