1.
another day, at a later date, some other time
A future point in time that is not specified. Used when postponing or deferring something, or when referring to events that occurred at some point after a reference point.
詳しい説明は後日いたします。
I will give a detailed explanation at a later date.
後日、改めてご連絡いたします。
I will contact you again on another day.
その事実が後日になって明らかになった。
That fact came to light at a later time.
USAGE:
A formal expression used in both spoken and written Japanese. Common in business communication and polite speech. As an adverb, it modifies verbs directly (後日連絡する). As a noun, it appears with particles (後日に, 後日になって).
COMMON PATTERNS:
- 後日改めて: on another occasion (polite set phrase)
- 後日連絡する: to contact at a later date
- 後日談: sequel, epilogue, follow-up story