I think they are okay here: This book is really interesting; we can discuss it during the lunch time tomorrow. These people often talk about politics during lunch time . Such matters need to be discussed during a lunch break
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teacherJapanSo you don't normally say "during a lunch time."I think so. However,context decides it.
teacherJapanSo you don't normally say "during a lunch time."Right.
teacherJapanSo you don't normally say "during a lunch time."You could, if you are saying that something will happen during a lunchtime but, not mentioning which one.
teacherJapan1) during a lunch timeWhen something happens during one lunch time out of more than one, but, you are not specifying which lunch time.
teacherJapan2) during the lunch timeWhen something happens during a particular lunch time that has already been mentioned or made clear from context.
teacherJa