When is 2020? According to the solar terms, how to calculate in a year?

First of all, solar terms are different from the lunar calendar.

According to the lunar calendar, the first day of a year is New Year's Day and the last day is New Year's Eve, so the mid-year algorithm can only calculate the actual number of days according to the size of the month. In 2020, it will leap in April, * * *1March.

As far as solar terms are concerned, the first day of each year is beginning of spring, and the last day is the day before beginning of spring next year. Just look at the beginning of spring time in the solar calendar and you can convert it.

For example, in 2020, beginning of spring is on February 4th, in 202 1 year, and beginning of spring is on February 3rd, one day earlier. But 2020 is a leap year, and there is one more day in February, so there are 365 days in 2020. Just find the day 183.