다음날 (taeumnal) means “the next day”

More examples

회의는 다음날로 연기되었어요.hoe ui neun ta eum nal lo yeon gi doe eo sseo yo

The meeting was postponed until the next day.

A day viewed as the one immediately after a particular day or event.

내일naeil: The day that comes after today.
이튿날iteunnal: A particular day following an earlier event, often recalled in a story.

특정 시점을 기준으로 그다음 날을 의미하는 명사teuk jjeong si jeo meul ki ju neu ro keu da eum na reul ui mi ha neun myeong sa

The word combines 다음 (daeum, "next") and 날 (nal, "day") to mean the day that follows a reference point.

Unlike a word for tomorrow, this word fits a story about a past day or any other day already named.