When will the number nine start and end in 2020?

The number nine refers to the nine days in the twenty-four solar terms, which are composed of three solar terms: slight cold, severe cold and beginning of spring. The number nine usually starts from the slight cold on February 23rd of the lunar calendar/kloc-0, and ends in beginning of spring on February 3rd of the following year. The number nine time in 2020 starts from the slight cold on June 5th, 2020 and ends in beginning of spring on October 28th, 2020/kloc-0.