How long are the sunshine hours in summer solstice and winter solstice in Jinan?

, sunset 19:32

A day is 14 hours and 40 minutes.

Jinan Winter Solstice Sunrise 7: 0019

, sunset 16:59

A day is 9 hours and 40 minutes long.

The difference between the summer solstice and the winter solstice is 5 hours.

Calculation method of day and night length

1.

Find the length of day and night according to the time of sunrise and sunset.

The day length of a place =( 12 hours-sunrise time) * 2;

The night length of a place =(24:00- sunset time) * 2;

Sunrise time: when the intersection of the morning line and the latitude line is on the meridian;

Sunset time: when the intersection of dark line and latitude line is on meridian.

2.

Calculation of day and night length on illumination map

According to the longitude of the day arc and night arc in the latitude circle where the point is located (V = 15/ hour);

Day arc+night arc = 360; Day length = day arc/volt, night length = night arc/volt; Day length+night length =24 hours.