今夜 (kon'ya) means “tonight” | MotiTan Japanese Dictionary

More examples

今夜は家で本を読みます。kon ya wa ie de hon o yo mi ma su

I will read a book at home tonight.

今夜の予定を確認します。kon ya no yo tei o kaku nin shi ma su

I will check my plans for tonight.

Marks the time from the current day's evening through its night.

今晩konban: The current evening and night, commonly used in everyday conversation.

現在の日の夕方から夜までの時間。gen zai no hi no yū gata ka ra yoru ma de no ji kan

The compound 今夜 (kon'ya) is made from 今 (kon, "now") and 夜 (ya, "night"), linking the present day with its night.

English uses tonight for the upcoming evening as well as the later hours of the night, so it is not limited to the time after sunset.