Why are there so many types of solar time?

The main reason is the connection between public life and daylight hours. The unevenness of true solar days leads to the appearance of an average solar time. The dependence of the mean solar time on the longitude of the place led to the invention of standard time. The need to save energy has led to daylight saving time.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.