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Excel - DAYS360 Function
DAYS360 Function
The Excel DAYS360 function will calculate the specific number of days between the start and end dates depending on a 360-day year (twelve 30-day months). It is categorized under the Date & Time functions in Excel.
The main difference between the DAYS and DAYS360 functions is that DAYS relies on the 365-day year, whereas the DAYS360 function depends on a 360-day calendar year.
Compatibility
This advanced Excel function is compatible with the following versions of MS-Excel
- Excel for Microsoft 365
- Excel for Microsoft 365 for Mac
- Excel for the web
- Excel 2024
- Excel 2024 for Mac
- Excel 2021
- Excel 2021 for Mac
- Excel 2019
- Excel 2016
- Excel 2013
- Excel 2010
- Excel 2007
Syntax
The syntax of the DAYS360 function is as follows −
=DAYS360(start_date,end_date,[method])
Arguments
You can use the following arguments with the DAYS360 function −
| Argument | Description | Required / Optional |
|---|---|---|
| Start_date | It specifies a valid date you may write through the DATE function or serial number. | Required |
| end_date |
It specifies another valid date or a date serial number. If start_date value comes after end_date, this function will return a non-positive number. |
Required |
| Method |
A logical value that informs you whether to utilize the U.S. method or the European method. The details of the Method Table is written below: |
Optional |
Method Table
| Method | Defined |
|---|---|
| FALSE or omitted | It specifies the US method. |
| TRUE | It specifies the European method. |
Points to Remember
- If the FALSE value is specified in the "method" argument and either the start_date or the end_date contains the last day of the month, then the month's 30th day would be considered.
- If the FALSE value is specified in the "method" argument, the start_date is before the month's 30th day, and the end_day is the last day of a specific month, then the end_date value will be the first day of the following month.
- If the TRUE value is referred to the "method" argument and either the start_date or the end_date contains the last day of the month, then the month's 30th day would be considered.
DAY360 Formula Not Working
- If the specified start_date or end_date arguments contain a numeric value not interpreted as valid dates, then the DAYS360 function will retrieve the #NUM! error.
- If a text string is not recognized as a date, then the DAYS360 function will retrieve the #VALUE! error.
- If the method argument contains a non-numeric value, then the DAYS360 function will retrieve the #VALUE! error.
Example of DAY360 Function
In this example, the DAYS360 function is applied in the selected range of cells to compute the number of days between two dates utilizing either Eurpoean or US methods.
Solution
Step 1 − First, assume the sample dataset where the start_date is defined in the cell range A3:A6 and the end_date is mentioned in the B3:B6 cells.
Step 2 − After that, select the C3 cell, write the formula "=DAYS360(A3,B3)" and hit the Enter tab. If you skip the third argument, the FALSE(US method) will be followed.
Therefore, the DAYS360 function returns 78 number of days between these two dates.
Step 3 − Moreover, double click on the C4 cell and type the formula "=DAYS360(A4,B4)" and then press the Enter tab.
Hence, the DAYS360 function will give a negative value, -339, specifying the number of days as the start_date is larger than the end_date.
Step 4 − Furthermore, move to the C5 cell and enter the formula =DAYS360(A5,B5,TRUE). The TRUE value means the European method is being used.
After pressing the Enter tab, the resulting value is 30.
Step 5 − Afterward, place the cursor on the C6 cell, double-click on it, and type the formula =DAYS360(A6,B6,FALSE). Here, the FALSE value indicates the US method used to evaluate the number of days.
Therefore, the DAYS360 function will generate the 300 as a result.
Download Practice Sheet
You can download and use the sample data sheet to practice the DAYS360 function.
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