How many days are there from August 12 to 10/3?

62 days. August to September is 3 1 day, September to 10 is 30 days, n-m+a+w = X. According to the above formula, 31-12+30+13 = 62 days. There are 12 months in a year, and the calendar is divided into solar calendar and lunar calendar. The solar calendar is a widely used calendar in the world. Lunar calendar is a unique calendar in China, commonly known as the Old Yellow Calendar.