DateTime DAX Data type

DAX stores dates as a DateTime data type. This format uses a floating-point number internally, wherein the integer corresponds to the number of days since December 30, 1899, and the decimal part identifies the fraction of the day. Hours, minutes, and seconds are converted to decimal fractions of a day. Thus, the following expression returns the current date plus one day (exactly 24 hours):

 = TODAY () + 1

The result is the date of tomorrow, at the time of the evaluation. If one only needs to take the date part of a DateTime, they should use INT or TRUNC to get rid of the decimal part.
In Power BI, there are two additional data types: Date and Time. Internally, they are a simple variation of DateTime. In fact, Date and Time only store the integer or the decimal part of the DateTime, respectively.

The first date officially supported by DAX is March 1, 1900. Date calculations executed on time periods prior to that date might lead to errors and should be considered as inaccurate.

Last update: Aug 5, 2019   » Contribute   » Show contributors

Contributors: Alberto Ferrari, Marco Russo, Kenneth Barber

Context Transition

This function performs a Context Transition if called in a Row Context. Click to read more.

Row Context

This expression is executed in a Row Context. Click to read more.


Not recommended

The use of this function is not recommended. See Remarks and Related functions for alternatives.

Not recommended

The use of this parameter is not recommended.


This function is deprecated. Jump to the Alternatives section to see the function to use.


This parameter is deprecated and its use is not recommended.


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