There are 24 hours in a day. The day is divided into day and night. Daytime is from sunrise (approximately at 6am) to sunset(approximately at 6pm). Night-time is from sunset to sunrise.
Every day starts precisely at midnight. AM (Ante-Meridiem = before noon) starts just after midnight. PM (Post-Meridiem=after noon) starts just after midday. This means that 12am and 12pm have no meaning.
This diagram shows the cycle of a 24-hour day and the words we use to describe its parts. The day starts at midnight.
To refer to these parts of the day, we use different prepositions:
In the morning.
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6,00 AM – 12,00 PM
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In the afternoon.
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12,00 PM – 6,00 PM
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In the evening.
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6,00 PM – 12,00 AM
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At night.
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12,00 AM – 6,00 AM
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