DAY Function in WPS Spreadsheet: Formula, Examples & Troubleshooting

=DAY(serial_number)

A valid date serial or date expression. In formula syntax, square brackets mark optional arguments; do not type square brackets into an ordinary formula unless the particular function requires array notation. The separator shown is for the example locale and might change with spreadsheet settings.

When to use it: DATE and EOMONTH help create unambiguous monthly boundaries.

Use a locally created WPS Spreadsheet workbook with editable numeric cells. After entering the example, inspect the formula bar and the function assistant rather than assuming a Microsoft Excel dialog behaves exactly the same. These two examples use literal values, so you can enter them into blank cells without first constructing a table. Their answers are independent calculations; dates must be displayed with an actual date format.

=DAY(DATE(2026,10,11))

Expected result: 11. The day component of October 11 is 11.

1. Select an unused output cell (for example H2 if the practice table occupies A1:F9).
2. Enter the formula exactly as shown, including the opening equals sign and quoted text.
3. Compare the displayed answer to the expected result, then inspect the source cells if it differs.

For a range formula, the row numbers include data rows only unless the example explicitly refers to headers. A result that looks plausible may still be wrong if it references the wrong column.

=DAY(DATE(2024,2,29))

Expected result: 29. Leap-day date returns day 29.

Perform the second check in a nearby blank cell to verify another input shape; do not paste into the example’s source ranges.

Watch out: DAY is day-of-month, not day-of-week; use WEEKDAY for weekday numbers.

WPS Desktop, cloud editing and mobile applications may not have exactly the same functions or advanced options; the official web reference does not replace an installed-version check.

If WPS reports a parsing error, check comma or semicolon separators in the installed locale. If a numeric result seems wrong, verify that imported numbers are genuine numbers, confirm absolute-reference markers, and review the function argument dialog.

If you get the wrong answer but no error, try these checks in order: (1) evaluate the simplified first example; (2) confirm the cell values and data types; (3) check the exact row and column boundaries; (4) verify quoted text, comparison operators and separators; (5) only then add more criteria or nested functions.

For a reproducible comparison with another spreadsheet product, use the same input values in both applications and record the installed version and locale. Different default matching behavior or handling of empty values can be a migration issue rather than a mathematical disagreement.

WPS advertises many Excel-style formulas, but that does not guarantee identical behavior across WPS editions, imported Excel workbooks or every advanced argument. Check the application’s function assistant when sharing workbooks.

Related guides already published for this function: Microsoft Excel | Google Sheets | LibreOffice Calc | Apache OpenOffice Calc | Gnumeric

If a comparison tool says Not researched here, that means we do not yet have a checked guide for that software. It does not mean the software lacks this function. See the 12-program comparison tool for a guide-coverage matrix.

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Evidence level: Vendor-published function catalogue / formula overview, checked for this editorial batch on October 11, 2026; example outputs verified by direct reasoning/arithmetic where applicable. No execution in WPS Spreadsheet was performed. Some platform-, language- and release-specific edge cases remain for native testing.