Today is Xiaoxue, the handle of Big Dipper directs to Northbound West. In Chinese custom, it’s suitable for constructing. On this day, it’s not really snowing, it just a signal of the weather become more and more cold, a signal for farmer.
Start of winter is the first solar term of winter, which means winter is coming and crops harvested in autumn should be stored up. It also implies that people should store things for the winter and keep the cold out.
Halloween is an autumn holiday that Americans celebrate every year, it means "holy evening," and it comes every October 31, the evening before all saints ' day. However, it is more a holiday for children mainly than a church holiday.