Dax Function: YEAR

Category: Date and Time Functions

The YEAR function in Power BI is a DAX function used to extract the year from a given date. It simplifies working with date and time data by isolating the year component for further analysis.

Purpose

Extracts the year from a date value.

Type of Calculations

Retrieves the numerical year (e.g., 2025) from a date field.

Practical Use Cases

  • Grouping and summarizing data by year.
  • Creating time-based calculations or comparisons.
  • Filtering data for specific years in reports.

YEAR(<date>)</date>
ParameterTypeDescription
dateScalarA single date or a column containing date values. Must be in a valid date format.

How Does YEAR Dax Function Works

The YEAR function isolates the year portion from a valid date input. The function operates by reading the internal representation of the date and returning the year component directly, ignoring the month, day, and time.

  • For example, if the input is DATE(2025, 2, 10), the YEAR function will return 2025.

What Does It Return?

  • Type: Integer.
  • Meaning: Returns a four-digit integer representing the year of the input date.

When Should We Use It?

  • Date Grouping: Use the YEAR function to group or filter data by specific years.
  • Year-over-Year Analysis: To calculate trends or metrics compared across years.
  • Time-Based Reporting: When creating visuals or measures segmented by years.

Examples

Basic Usage

Extract the year from a specific date:


YearExample = YEAR(DATE(2025, 2, 10))

Output: Returns 2025.

Column Usage:

Create a calculated column to extract the year from a date column:


OrderYear = YEAR(Table[OrderDate])

Output: For each row, returns the year part of the OrderDate column.

Advanced Usage

Combine YEAR with other DAX functions to create dynamic calculations:


SalesThisYear = CALCULATE(SUM(Sales[Amount]), YEAR(Sales[OrderDate]) = YEAR(TODAY()))

Output: Calculates total sales for the current year.

Tips and Tricks

  • Ensure Valid Dates: The input must be in a recognized date format to avoid errors.
  • Use with Filters: Combine YEAR with filtering functions like FILTER or CALCULATE for precise analysis.
  • Integrate with Time Intelligence: Combine YEAR with DAX time functions for robust date analysis.

Potential Pitfalls

  • Invalid Input: If the date parameter contains non-date values or invalid formats, the function will throw an error.
  • Time Information Ignored: The YEAR function disregards the time component entirely.

Performance Impact of YEAR DAX Function:

  • Lightweight and efficient for extracting years from scalar values or columns.
  • Use with calculated measures instead of calculated columns to save memory and improve performance on large datasets.

Related Functions You Might Need

  • MONTH: Extracts the month from a date.
  • DAY: Extracts the day from a date.
  • DATE: Constructs a date from year, month, and day values.
  • TODAY: Returns the current date.
  • YEARFRAC: Calculates the fractional year difference between two dates.

Want to Learn More?
For more information, check out the official Microsoft documentation for YEAR You can also experiment with this function in your Power BI reports to explore its capabilities.

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1. What does the YEAR function do in Power BI?

It extracts the year from a date value, returning a four-digit integer.

2. Can I use the YEAR function with text inputs?

No, the input must be a valid date. Use functions like DATEVALUE to convert text to a date format first.

3. How does the YEAR function handle invalid dates?

It will throw an error if the date parameter contains invalid or non-date values.

4. Can the YEAR function handle time zones?

The YEAR function only considers the date portion and ignores time and time zones.

5. Is the YEAR function compatible with fiscal calendars?

No, but you can build custom logic to align extracted years with fiscal years.

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