Halloween is a festival about ghosts. Americans really like this festival. How much do they like it? Here's an example: even though the official date of the festival is October 31st every year, in fact, from early October, the festive atmosphere can be felt everywhere. The most obvious sign is that all stores will be decorated with spider webs, witches, vampires, skulls and so on. Many people also start to place jack-o'-lanterns at their doorsteps. This is somewhat similar to how Chinese Spring Festival lasts for almost half a month.