正午

In a sentence

• 正午に食事をしようと思っています。

  I am thinking of having a meal at noon.

  Here, 正午 is used to denote the specific time of day—noon—and serves as the temporal indicator for the action.

• 電車は正午に到着します。

  The train will arrive at noon.

  In this instance, 正午 specifies the exact expected time of arrival of the train, providing precise temporal information.

• 正午を過ぎて天気が悪くなった。

  It became gloomy and the weather turned worse after noon.

  Here, 正午 is used to mark the boundary of a time period, reflecting the point in time after which something occurred.