The Japanese noun '昼間 (ひるま)' refers to the period of the day when the sun is up, typically from sunrise to sunset. It is used to describe activities or events that occur during daylight hours. For example: I work during the daytime「私は昼間に働きます」(わたしはひるまにはたらきます). It's quiet during the daytime「昼間は静かです」(ひるまはしずかです). This word is often used in contrast to '夜 (よる)' which means 'night'. It's important to note that '昼間' specifically refers to the time of day and not the concept of 'day' as in a 24-hour period, which would be '一日 (いちにち)'.
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