Table of Contents
This guide explains how to use DAY Function in Excel, including its syntax, required arguments, practical examples, and common errors.

Description: The function returns date values in specific date, month and year format in Excel.
Syntax: DAY (serial_number)
Where: serial_number is the date value of the date you are looking for.
Attention:
- Excel stores the date as a serial number to facilitate the calculation process.
For example:
Calculate date values in the following date formats:

- In the cell to calculate enter the formula: = DAY (F7).

- Press Enter -> return value is:

- Similarly copying the formula for the remaining values results:

- Where the day, month, and year values are individual values -> enter the following formula: = DAY (F12 & "/" & G12 & "/" & H12) -> press Enter -> return value is:

Above are instructions and some specific examples when using the DAY function in Excel.
Good luck!
FAQ
What does the DAY function do in Excel?
The DAY function performs the calculation described in this guide. Use the correct arguments and compatible data types for reliable results.
How do I enter the DAY function correctly?
Start with an equals sign, enter DAY, add the required arguments inside parentheses, and confirm that cell references and separators are correct.
Why does the DAY function return an error?
Common causes include missing arguments, invalid data types, incorrect cell references, unsupported values, or regional separator settings.
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