Excel Practice - DAY
Instruction
Extract only the day-of-month number from date in A2.
Formula Syntax
=DAY(serial_number)
- serial_number: Date/time value to process.
What it does
Extract day number from a date value.
date-calendar.xlsx
| A | B | |
|---|---|---|
| 1 | Date | Offset Months |
| 2 | 2026-01-15 | 0 |
| 3 | 2026-02-28 | 1 |
| 4 | 2026-03-31 | -1 |
| 5 | 2026-07-04 | 2 |
| 6 | 2026-12-20 | 3 |
| 7 | Output |
Input Formula
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Tips
- Use DAY with clean and consistent ranges for predictable results.
- Validate data types (number, text, date) before applying the formula.
- Test the formula with a small sample first, then scale it to larger ranges.