Midnight

Midnight is the opposite of solar midday. On computer clocks, the day changes to the next day the minute(s) after midnight.

Midnight in Rome.

Start and end of the day

In the world, midnight is the start of one day and the end of the last day. It is the dividing point between two days. In the United States and Canada, digital clocks and computers usually show 12am. right at midnight. However, people have to remember that any time is actually an instant. The am shown on clock displays means the 12-hour period after the instant of midnight. So when a clock says 12am, midnight has already passed and a new day has started. In other words, 11:59 pm shows until midnight; at the instant of midnight, it changes to 12:00. At the same time, the pm changes to am, but am does not mean the instant of midnight which separates pm and am.