年月日|ねんがっぴnengappi[3]nakadaka (mid-high)

1. noundate (year, month and day)

• Synonym日付ひづけNeutralThe date entered on a letter or document, as in 「日付を書く」; unlike 「年月日」, it does not highlight the year, month and day as three separate items.
• Related日にちひにちNeutralA date that is set, or a number of days, as in 「日にちが決まる」; common in everyday speech, where 「年月日」 is the full form-filling date.
• Related期日きじつWrittenA date fixed in advance or a deadline, as in 「支払期日」; written/formal prose with a legal and business flavor.
• Related日時にちじNeutralDate plus time of day, as in 「会議の日時」; unlike 「年月日」, it includes a specific time.
• Related時日じじつWrittenA written/formal word for days and time, as in 「時日を要する」; not often used.

Fill in year, month and day on forms with 「年月日」, as in 「生年月日」. Use 「日付」 for the date on a document, 「日にち」 for days or a count of days, 「期日」 for a deadline, and 「日時」 when a time is included; 「時日」 is a rare written alternative.

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

1. 年ねんと月つきと日ひ。日付ひづけ。