Returns the serial number of a particular date. Essential for creating dates from separate year, month, and day components, enabling dynamic date generation and calculations in Excel.
Master the fundamentals of Excel DATE function
The DATE function is Excel's fundamental date creation function that returns the serial number of a date from year, month, and day components. Excel stores dates as serial numbers where January 1, 1900 is serial number 1. This system enables efficient date arithmetic and calculations.
Excel stores dates as serial numbers where 1 = January 1, 1900. Each day increments the serial number by 1.
Excel automatically adjusts invalid dates. Month 13 becomes January of next year, day 35 becomes day 4-5 of next month.
Supports years from 1900 to 9999, covering a wide range of historical and future dates.
Enables creation of dates from variable inputs, making it essential for date calculations and manipulations.
Function-specific parameters
Function-specific return type
Create dates for calculations, comparisons, and date arithmetic
Generate dates from variable inputs or calculations
Implement business rules involving date creation and validation
Combine with formatting functions to create custom date displays
Exact matching required
Returns numeric position
Handles missing text gracefully
=DATE(year, month, day)The year (1900-9999). Excel supports years from 1900 to 9999.
The month (1-12). Excel automatically adjusts invalid months (e.g., 13 becomes January of next year, 0 becomes December of previous year).
The day (1-31). Excel automatically adjusts invalid days (e.g., day 35 becomes day 4 or 5 of next month depending on month length).
The serial number of the date (Excel date serial number)
Description: Creates a date from year, month, and day components
Create a date from year, month, and day values
Returns the serial number for January 15, 2024. Excel stores dates as serial numbers where January 1, 1900 is serial number 1.
Simple VBA implementation using DateSerial function
Sub DATEExample()
Dim result As Date
' Using DateSerial (equivalent to DATE function)
result = DateSerial(2024, 1, 15)
Range("A1").Value = result
MsgBox "DATE(2024, 1, 15) = " & Format(result, "mm/dd/yyyy")
End Sub
' Create date from variables
Sub CreateDateFromCells()
Dim year As Integer, month As Integer, day As Integer
Dim result As Date
year = Range("A1").Value
month = Range("B1").Value
day = Range("C1").Value
result = DateSerial(year, month, day)
Range("D1").Value = result
End Sub
' Loop to create dates
Sub CreateDateSeries()
Dim i As Integer
For i = 1 To 12
Range("A" & i).Value = DateSerial(2024, i, 1)
Next i
End SubCreate dates from separate year, month, day components
Generate dates from variable inputs
Use with arithmetic for date manipulations
Implement date-based business rules
DATE returns a different date than expected
=DATE(2024, 13, 1)Solution: Excel automatically adjusts invalid dates. Month 13 becomes January of next year, and day values exceeding month length roll over to next month. Verify your month and day values are within expected ranges or account for Excel's adjustment behavior.
DATE returns a number instead of a formatted date
=DATE(2024, 1, 15)Solution: Format the cell as a date to display properly. The serial number is correct; Excel just needs formatting to show it as a date. Right-click cell → Format Cells → Date.
Errors when using years outside 1900-9999 range
=DATE(1800, 1, 1)Solution: Ensure year values are between 1900 and 9999. For historical dates before 1900 or dates beyond 9999, consider alternative approaches or date storage methods.