What does the first day of the first month mean?

1, 59 years old is a solar term and belongs to the way of counting nine. From the solstice of winter, every nine days is a unit, and counting to the fifth nine is called 59. For example, last year's winter solstice was 65438+February 22, so this year's May 9 range is: 2023 65438+1October 27 to February 4, 2023, and the sixth day of the first month falls on the Gregorian calendar 65438+1October 27, just within the time range of May 9.