31+31+30+31+30+31 = 184 days
They lasted almost a year, not six months.
Generally baking powder will last for six months to one year.
Six months after their last birthday...
The treatment may last about six months, but in some cases may last as long as a year.
The last six months are July, August, September, October, November, and December, and they are 31, 31, 30, 31, 30, and 31 days long, respectively. Added together, this makes 184 days total in the last six months of the year, a little more than half of the total 365 days per year.
18 months
six months to a year A+ Six months to a year or more.
A period of six months is called half a year.
Six months
Six months from December 31 is June 30 of the following year. This period encompasses the first half of the new year, ending with the last day of June.
Twenty-six weeks is six months.
31+31+30+31+30+31 = 184 days in total.