The Mid-Autumn Festival Moonlight Symposium used a meteorological term.

The Mid-Autumn Moonlight Symposium will be cloudy tomorrow night. Mid-Autumn Moon Night refers to the moon in the Mid-Autumn Festival, and night means late. A symposium generally means that many people are talking, which means cloudy. That is to say, in meteorology, the cloud coverage in the sky accounts for four to eight tenths of the sky. Be careful of ultraviolet rays when you are active in cloudy weather. Ultraviolet is the general name of radiation with wavelength from 10 nm to 400 nm in the electromagnetic spectrum, which is imperceptible to human eyes. But too much ultraviolet light may hurt your eyes.

The German Good Vision Association reminds that in cloudy summer, people should not forget to protect sensitive eyes, because some ultraviolet rays can still reach the surface through clouds, and long-term use may cause certain damage to eyes. The association also said that people who stay near the water for a long time should pay more attention to protecting their eyes because the water reflects light. If the eyes are damaged by too much ultraviolet rays, there will be symptoms such as redness, tears and eye muscle tension.

Extended data

Mid-Autumn Festival, also known as Moon Festival, Moonlight Birthday, Moon Festival, Autumn Festival, Mid-Autumn Festival, Moon Festival, Moon Festival and Reunion Festival, is a traditional folk festival in China. The Mid-Autumn Festival originated from the worship of celestial phenomena and evolved from the worship of the autumn moon in ancient times. Since ancient times, Mid-Autumn Festival has had folk customs such as offering sacrifices to the moon, enjoying the moon, eating moon cakes, playing with lanterns, enjoying osmanthus and drinking osmanthus wine. It has been circulating for a long time.