Noon; lunchtime — the time around midday, often when shops or workplaces are busiest. Can also be used adverbially.
昼時はレストランが混むので、少し早めに行こう。
Restaurants get crowded at lunchtime, so let's go a little earlier.
学校では昼時に校庭でお弁当を広げる生徒が多い。
At school, many students spread out their lunches on the playground at lunchtime.
昼時に電話は控えてください。
Please refrain from calling during lunchtime.