Civil time

Civil time means the time that everyone in a city, country, or even the whole world agrees on using. It is the time that is on your phone, computer, and watches, so that everyone can know when to go to school, work or go to bed without confusion.

There is a very special place called the Prime Meridian, which is located in Greenwich, London. This is the imaginary line that divides the Earth into two hemispheres (east and west) and has a value of 0° longitude. The Prime Meridian is used as the reference point for all time zones around the world.

Time zones are like slices of a big pizza, and each slice tells you what time it is in a different part of the world. So, when it is 12 PM in London, it is not 12 PM everywhere else in the world because other cities are in different time zones. For example, New York City is 5 hours behind London, so it would be 7 AM in New York when it's 12 PM in London.

Civil time also changes during the year because of something called daylight saving time. During summer, when the sun rises very early and sets very late, some countries move their clocks forward by one hour to get more daylight in the evenings. This means that people can stay outside and enjoy the sun for longer. But, during the winter when the days are shorter, the clocks are moved back by one hour, so people can have more daylight in the mornings.

So, in summary, civil time is the time that everyone uses as a reference for all parts of the world, which is divided into time zones and changes with daylight saving time. All this is possible thanks to the imaginary line called the Prime Meridian in Greenwich, London.