WorksheetFunction.Days360(Object, Object, Object) Method

Definition

Namespace:

Microsoft.Office.Interop.Excel

Assembly:

Microsoft.Office.Interop.Excel.dll

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.

public double Days360 (object Arg1, object Arg2, object Arg3);

Public Function Days360 (Arg1 As Object, Arg2 As Object, Optional Arg3 As Object) As Double

Parameters

Arg1

Object

The two dates between which you want to know the number of days. If start_date (Arg1) occurs after end_date (Arg2), Days360 returns a negative number. Dates should be entered by using the DATE function, or as results of other formulas or functions.

Arg2

Object

The two dates between which you want to know the number of days. If start_date (Arg1) occurs after end_date (Arg2), Days360 returns a negative number. Dates should be entered by using the DATE function, or as results of other formulas or functions.

Arg3

Object

A Boolean value that specifies whether to use the U.S. or European method in the calculation.

Returns

Double

Remarks

Use this function to help compute payments if your accounting system is based on twelve 30-day months.The following tables contains the values for Arg3.

false or omitted	U.S. (NASD) method. 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 earlier 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.
true	European method. Starting dates and ending dates that occur on the 31st of a month become equal to the 30th of the same month.

Microsoft Excel stores dates as sequential serial numbers so they can be used in calculations. By default, January 1, 1900 is serial number 1, and January 1, 2008 is serial number 39448 because it is 39,448 days after January 1, 1900. Microsoft Excel for the Macintosh uses a different date system as its default.