When using DAYS360, the most common issues fall into 3 areas: formula errors, parameter understanding, and unexpected results; this FAQ includes 3 common questions and a glossary.
FAQ
What should I do if the DAYS360 function shows an error after I enter it?
- Check whether the formula starts with
=. - Check whether the parentheses, commas, and number of arguments are correct.
- Confirm that the start date and end date cells contain valid date values.
- If needed, test again with
=DAYS360(start_date,end_date,[method]).
What does the third argument in DAYS360 do?
- The third argument,
method, specifies the date-count method. - If you omit it, the function uses its default calculation method.
- If your business scenario requires a different convention, enter the method value and compare the result.
Why is the DAYS360 result different from directly subtracting two dates?
- DAYS360 uses a 360-day year rule rather than a natural-day difference.
- Results can differ when dates fall at month end or across different months.
- Use DAYS360 for fixed accounting-style conventions, and use other date calculations when you need natural-day differences.
Glossary
| Term | Definition |
|---|---|
| DAYS360 | A function that calculates the number of days between two dates based on a 360-day year. |
| start_date | The starting date argument in the formula. |
| end_date | The ending date argument in the formula. |
| method | An optional argument that specifies the date-count method. |