End of the summer and winter time

July 19, 2017,  |  Disadvantages of the summer and winter time
Our biorhythm (internal body's clock) changes depending on the position of the sun. When the summer time takes place, humans internal body clock gets disrupted and sleep is disrupted too.

The summer and winter time change brings problems when travelling on a day of the time change.

Mechanical and some digital clocks and watches are needed to be changed 2 times a year.

Advantages of the summer and winter time
Saved energy, but is it more important than people's health?

One time zone for the entire Earth
When the summer and winter time will be abolished, nothing will be in a way for one time zone for the world.