What does the following mean?

Christmas and Halloween are the most commercialized celebrations in the United States and Canada. This ancient festival originated in North America, however, before the first century set foot on the European continent.

One of the festivals is called Samhain (pronounced Sha Feng), which is held from June 3 1 day to June 1 1 day. During this period, some people think that the boundary between our world and the dead world is weakened, allowing the spirit of recent death to cross and have life.

In Ireland, they also used turnips as their Jack-o-lanterns at first, but when they arrived in the New World, they found that pumpkins were abundant and easier to develop.

This annual art festival is through the Roman invaders, who help spread (spread, publicize) in the rest of the world (when the Roman Empire was the world). The word Halloween itself actually comes from Halloween (1 1 October, 1), which is a contraction of the day to commemorate the observance of Catholicism by saints.

This tradition was later adopted by Irish immigrants from the North American continent to escape the potato famine in their hometown. In addition to the festival itself, immigrants brought several customs, including one of the most common symbols related to Halloween-Jack "O" lights.