How many days are there from September 1, 20 16 to February 3 1, 20 19?

20 16 September 1 to 20 19 February 3 1 According to the calendar:? 12 16 days. Counting September 20 16 1 this day is 16 17 days.

The perpetual calendar is the oldest solar calendar in ancient legends of China. The name of the perpetual calendar comes from a man named Wannian in Shang Dynasty, who was the editor of this calendar. In order to commemorate his achievements, he named this calendar "perpetual calendar". A perpetual calendar is an annual calendar that records the dates of specific solar and lunar calendars within a certain time range, which is convenient for people in need to inquire and use. Ten thousand years is just a symbol, indicating a long time span.

Modern perpetual calendars can display various calendars such as solar calendar, lunar calendar and dry calendar at the same time, and can also contain various functional information such as auspiciousness, unlucky, taboos, holidays and reminders.

A year is divided into 24 solar terms according to the movement of the sun and several months according to the movement of the moon. Twelve miscarriages and big months add up to only 354 or 355 days. Compared with the two, the difference is about eleven days. In order to coordinate the two, the ancients adopted the method of "fixed leap", and one year in several years was thirteen months.