今こん明みょう日にち

こ

ん

みょ

う

に

ち

Meanings

1

noun, adverb

today and/or tomorrow; within a day or two

Used to refer to the immediate near future, typically within the next day or two. Often implies a short, indefinite timeframe.

近きん日じつ
近日 refers to a slightly broader near future (e.g., within a few days), while こんみょうにち is more narrowly today or tomorrow.
今明日中こんみょうにちじゅう
今明日中 is a common variant that explicitly means 'within today or tomorrow'.

Compound of 今 (こん, 'now') and 明日 (みょうにち, 'tomorrow'). The reading みょうにち is the on'yomi of 明日.