Guarding with a trumpet is an ancient folk activity that is common in rural areas of China. According to tradition, a suitable date needs to be selected for trumpet divination. The principle of choosing a date is usually calculated based on the lunar calendar and the individual's birth date. The birth date refers to the year, month, day and hour corresponding to the date and time of a person's birth. You can understand your personal destiny and fortune through your birth date and horoscope. Therefore, when choosing a date for trumpet divination, it is common practice to base it on an individual's birth date. However, in modern society, some people will also choose the date of divination based on their own schedule and actual situation, and not necessarily based on their birth date. In general, birthdays have certain reference value for trumpet predictions, but they are not necessary.