I don't understand what the weather forecast says.

The time period mentioned in the weather forecast is divided as follows: take 20 o'clock as the daily boundary, for example, tomorrow is after 20 o'clock this evening. Different from ordinary people, 24: 00 is usually the limit of a day. 20 pm to 8 pm; The daytime is 8-20 hours. From tonight to tomorrow, the daytime is 24 hours from 20: 00 this evening to 20: 00 tomorrow evening. (Unified by the World Meteorological Organization, universal)

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Similarly, today's day to night is 24 hours from 8: 00 today to 8: 00 tomorrow.