expression, noun, adverb
Emphasizes the middle of the day, often with a nuance of 'in broad daylight'. Used as a noun or adverb. Compare 真っ昼間 (まっぴるま), which is more emphatic.
See also: 真っ昼間 (まっぴるま)
昼日中から酒を飲むなんて、どうかしている。
Drinking alcohol in broad daylight is crazy.
昼日中
I like taking a walk in the park in the middle of the day.
More emphatic and colloquial than 昼日中, strongly stressing 'in broad daylight'.
Compound of 昼 (ひる, 'daytime') and 日中 (ひなか, 'middle of the day'). The reading ひなか for 日中 is an older or less common reading.