The biggest factor in how many calories you burn per mile of walking is your weight rather than your speed. According to the research that produced these numbers, at a walking pace speed makes only a minor difference. You will burn more calories by walking more miles.
I believe the Army starts their fiscal year on 1st October and runs until 30 September.
Others use the fiscal year, which is an accounting period that ends on the last day of any month except December. For instance, the U.S. government fiscal year is Sept. 1 through Aug. 31. A company that sells seasonal products might select a fiscal year that reflects revenue and expenses most favorably.