365 / 180 = 2.0277777777777…
Adding 180 days to September 9 on a non-leap year gives March 7 of the following year. Adding 180 days to September on a leap year gives March 6 of the following year.
In a non-leap year, adding 180 days to January 9 gives July 8. In a leap year, adding 180 days to January 9 gives July 7.
Heading into a non-leap year, adding 180 days to December 21 gives June 19 of the following year. Heading into a leap year, adding 180 days to December 21 gives June 18 of the following year.
Adding 180 days to January 17 on a non-leap year gives July 16. Adding 180 days to January 17 on a leap year gives July 15.
Leap year 3/30 Non leap year 3/31
Adding 180 days to September 13 leading into a non-leap year gives March 12 of the following year. Adding 180 days to September 13 leading into a leap year gives March 11 of the following year.
Heading into a non-leap year, adding 180 days to October 18 gives April 16 of the following year. Heading into a leap year, adding 180 days to October 18 gives April 15 of the following year.
180 days in a normal year, 181 days in a leap year.
The 13th of March is 180 days before it. The 8th of March is 180 days after it, except when that March is in a leap year, in which case the 7th of March is 180 days after it.
In a normal year, adding 180 days to January 18 gives July 17 of the same year. Adding 180 days to January 18 in a leap year gives July 16.
The 23rd of June in a normal year and the 22nd of June in a leap year.
The 180th day of the year typically falls on June 29 in a common year and June 30 in a leap year. In a common year, January has 31 days, February has 28 days, March has 31 days, April has 30 days, May has 31 days, and June has 30 days, totaling 180 days by June 29. In a leap year, February has 29 days, making June 30 the 180th day.