What is the date when the sun shines directly on the Tropic of Cancer?

The time when the sun directly hits the Tropic of Cancer is June 2 1-22 in Gregorian calendar.

The Tropic of Cancer is the dividing line where the sun moves back and forth directly on the earth every year. The day when the sun shines directly on the Tropic of Cancer is the solstice in summer in the northern hemisphere and the solstice in winter in the southern hemisphere. The specific time when the sun directly hits the Tropic of Cancer is not fixed, and it is usually June 2 1-22 in Gregorian calendar.

Summer solstice is one of the 24 solar terms in China, which represents the arrival of hot summer. The solstice in summer is the turning point of the sun's northward movement. After the summer solstice, the sun will go back, and the direct sunlight point will start to return from north to south first. Summer solstice belongs to midsummer, with strong sunshine and the longest day.

Characteristics of Tropic of Cancer

When the earth revolves around the sun, the intersection angle between the earth axis (earth rotation axis) and the ecliptic plane (orbit plane) is always 66 34'. In other words, the earth always tilts around the sun. In this way, the earth sometimes leans towards the sun in the northern hemisphere and sometimes leans towards the sun in the southern hemisphere, so the position where the sun directly touches the earth will move north and south with time.

On the day of summer solstice, the sun shines directly at the latitude of 23 26' north latitude. After the summer solstice, the sun gradually moved southward, and the time of exposure to the sun in the northern hemisphere gradually decreased. The latitude of 23 26' north latitude is the northernmost limit of the direct sunlight point in the northern hemisphere, so this latitude is called the Tropic of Cancer.

On the solstice of winter, the sun shines directly at the latitude of 23 26' south latitude. After the winter solstice, the sun began to move northward gradually, and on the summer solstice, it directly hit the tropic of cancer. The latitude of 23 26' south latitude is the southernmost limit of direct sunlight in the southern hemisphere, which is called tropic of Capricorn.