It is thought that this superstition originates in Egypt thousands of years ago. The Egyptians strongly believed in the power of the pyramids. So much so that even a ladder leaning against a wall formed a triangle which symbolised a pyramid. They believed that walking under a ladder would break the ‘power’ of the pyramid and bring bad luck.

 If you see onemagpie, you will have bad luck with your next partner.
By David

There are a few different explanations about the origins of “God bless you”. The first theory back to the first century, in this time a sneeze meant the body was trying to expel an evil spirit. So in that case, if someone says to you "God bless you", this will be a way of trying to provide protection against evil spirits. 

Others believed that our hearts stop when we sneeze, so we say “God bless you,” as thanks to God, for surviving. 

However, the most popular theory is that it originated in Rome when the bubonic plague was ravaging Europe. Sneezing was one the plague's main symptoms, so Pope Gregory I suggested that a tiny prayer in the form of saying, "God bless you" after a sneeze would protect the person from death.
By Eva and Elena.

However, before the spread of Christianity, the magpie was an important symbolic bird often associated with good luck or fortune. Some Native American tribes, for example, 

believed that wearing a magpie feather was a sign of bravery, while others considered the magpie to be a sacred messenger from the creator.

But the Church saw the magpie very differently, saying that it was the only bird that didn’t cry for Jesus during his death or that he didn’t enter a period of mourning due to its multi-colored plumage. We could say then that if Jesus hadn’t died, the superstitions around the warblers would never have appeared.

But why did the magpie have such a bad reputation and how did these superstitions come out?

Like other corvids, magpies have long been associated with death.

Magpies are also known for their inquisitive and mischievous nature, which means they earned a somewhat unfair reputation as thieves. If a precious ring disappeared, people blamed the crows

Over time, the idea that magpies were bad birds evolved into the idea that magpies will bring bad luck.

However, you only see a bad magpie when it is lonely as it is supposed to bring bad luck.

We are not entirely sure why this is the case, but we know that magpies often mate for life, so if we see a lone magpie it means that it has lost its partner, therefore, the possibility that it brings bad luck is greater .

To avoid the bad luck that can come from seeing a lone magpie, there are several things you can do such as greet the magpie, quickly blink your shoulders, or wave your hands like wings.

The fear of a lone magpie bringing bad luck is fairly common across the UK, but in some areas there are more magpie-specific superstitions:

-Scotland: a single magpie seen near the window of a house is a sign of imminent death.

-Welsh: if you see a magpie when you start a journey and move from right to left, the journey will be dangerous.
-Ireland: magpies are the souls of evil and gossiping women.

-Somersault: carrying an onion with you at all times will offer you protection against the bad luck that a magpie can bring.
By Jenifer and Kely.

It originated in the United Kingdom and is celebrated in a number of countries that previously formed part of the British Empire.

In Britain, it was a custom for merchants to deliver “Christmas boxes” of money or gifts to their workers on December 26 if they have provided good service as a sign of gratitude.

It's a well-known holiday for shopping, much like Black Friday.

Boxing Day is the highest earning day.