Calculation of season, festival, gas and weather days

90 days in a season, 45 days in a period, once 15 days, 5 days at a time.

All the year round (spring, summer, autumn and winter),

Section 8 (Spring Equinox in beginning of spring, Long Summer Solstice, Autumn Equinox in beginning of autumn, Winter Solstice),

Twenty-four qi (twenty-four solar terms),

72 Waiting (Western worship, 7 days a week; In the past, Chinese medicine was prescribed for five days as a course of treatment, and then it was followed by a follow-up visit with climate change. In the past, we didn't have weekends, only busy farming, so we basically went to bed early and got up early. In the machine age, talents and machines work day and night, racing against poverty. Later, I had a vacation to recuperate and take the initiative to brake).