=DAY(serial_number)One free generation or explanation per browser, shared across Excel and Google Sheets. Account usage limits apply afterward.
Need more than a single DAY formula? Try our free AI for Excel — it reads your entire spreadsheet, answers questions in plain English, and builds charts and analysis in the same chat.
serial_number:
A valid Excel date in the form of a serial number from which you want to extract the day. This can be a cell reference or a date value.
The DAY function in Excel is a simple yet effective tool that allows you to extract the day of the month from a given date. It returns an integer representing the day, which can be useful for various date-related calculations and analyses.
In simpler terms, the DAY function helps you identify the specific day of a date, making it easier to work with dates in your data.
Imagine you are managing a project timeline, and you have the following data in an Excel spreadsheet:
| Task | Start Date |
|---|---|
| Task A | 2023-10-01 |
| Task B | 2023-10-15 |
| Task C | 2023-10-20 |
| Task D | 2023-10-25 |
| Task E | 2023-10-30 |
You want to find out the day of the month for each task's start date.
To extract the day of the month for Task A, you would use the DAY formula as follows:
=DAY(B2)When you apply the formula to each task's start date, you will get the following results:
| Task | Start Date | Day of Month |
|---|---|---|
| Task A | 2023-10-01 | 1 |
| Task B | 2023-10-15 | 15 |
| Task C | 2023-10-20 | 20 |
| Task D | 2023-10-25 | 25 |
| Task E | 2023-10-30 | 30 |
Here, the DAY function extracts the day from each date, providing you with the corresponding day of the month.
The DAY function is particularly useful when you need to analyze or manipulate dates, such as sorting tasks by their start days or calculating deadlines based on specific days of the month. It allows you to quickly derive insights and make date-driven decisions.
Understanding how to use the DAY function can significantly enhance your date analysis capabilities in Excel, enabling you to extract meaningful insights from your date datasets.
Happy calculating!
You have a table where Column A contains transaction dates and Column B contains transaction amounts. You can use the DAY function to extract the day of the month from each transaction date. This allows for easy analysis of daily sales patterns, helping you identify peak sales days and optimize inventory management without the need for complex date manipulation functions.
Beyond the DAY function: Better Analyst is a full Excel AI that goes well past individual formulas. Upload any spreadsheet and ask questions in plain English — you'll get formulas, data analysis, and charts back in seconds. It's a free AI Excel assistant that works with any .xlsx, .xls, or .csv file — no plugins, no Microsoft 365 required.
Don't have a spreadsheet yet? Use our free AI spreadsheet generator to turn a text prompt into a downloadable Excel file — a full AI Excel sheet maker that builds headers, columns, and formulas from your description.
Create a free account for formula help, explanations, and spreadsheet analysis. Usage limits depend on your plan.
Browse our complete library of Excel formula guides
Compare your options
Open a neutral research prompt in the AI tool you already use. Compare capabilities, limitations, and fit before you choose.
AI answers can be incomplete. Check source links, current pricing, and product documentation before deciding.