Returns the number of days between two dates based on a 360-day year (twelve 30-day months), which is used in some accounting calculations. Use this function to help compute payments if your accounting system is based on twelve 30-day months.
Start_date and end_date are the two dates between which you want to know the number of days. If start_date occurs after end_date, DAYS360 returns a negative number.
Method is a logical value that specifies whether to use the U.S. or European method in the calculation
FALSE or omitted
U.S. (NASD). If the starting date is the 31st of a month, it becomes equal to the 30th of the same month. If the ending date is the 31st of a month and the starting date is less than the 30th of a month, the ending date becomes equal to the 1st of the next month, otherwise the ending date becomes equal to the 30th of the same month.
European method. Starting dates or ending dates that occur on the 31st of a month become equal to the 30th of the same month.
Tip To determine the number of days between two dates in a normal year, you can use normal subtraction — for example, "12/31/93"-"1/1/93" equals 364.
DAYS360("1/30/93", "2/1/93") equals 1
If cell D10 contains the date 1/30/93 and cell D11 contains the date 2/1/93, then:
DAYS360(D10, D11) equals 1