DATESYTD DAX Function (Time Intelligence) Context Transition

Returns a set of dates in the year up to the last date visible in the filter context.

Syntax

DATESYTD ( <Dates> [, <YearEndDate>] )

Parameter	Attributes	Description
Dates		The name of a column containing dates or a one column table containing dates.
YearEndDate	Optional	End of year date.

Table A table with a single column.

A table containing a single column of date values.

In order to use any time intelligence calculation, you need a well-formed date table. The Date table must satisfy the following requirements:

All dates need to be present for the years required. The Date table must always start on January 1 and end on December 31, including all the days in this range. If the report only references fiscal years, then the date table must include all the dates from the first to the last day of a fiscal year. For example, if the fiscal year 2008 starts on July 1, 2007, then the Date table must include all the days from July 1, 2007 to June 30, 2008.
There needs to be a column with a DateTime or Date data type containing unique values. This column is usually called Date. Even though the Date column is often used to define relationships with other tables, this is not required. Still, the Date column must contain unique values and should be referenced by the Mark as Date Table feature. In case the column also contains a time part, no time should be used – for example, the time should always be 12:00 am.
The Date table must be marked as a date table in the model, in case the relationship between the Date table and any other table is not based on the Date.

The dates argument can be any of the following:

A reference to a date/time column. Only in this case a context transition applies because the column reference is replaced by
- CALCULATETABLE ( DISTINCT ( <Dates> ) )
A table expression that returns a single column of date/time values.
A Boolean expression that defines a single-column table of date/time values.

The result table includes only dates that exist in the dates column.

The syntax:

DATESYTD ( <Dates>[, <YearEndDate>] )

corresponds to:

DATESBETWEEN ( 
    <Dates>, 
    STARTOFYEAR ( LASTDATE ( <Dates> )[, <YearEndDate>] ),
    LASTDATE ( <Dates> ) 
)

Learn more about DATESYTD in the following articles:

Time Intelligence in Power BI Desktop

In Power BI Desktop (as of February 2016) you have to use DAX to apply calculations over dates (such as year-to-date, year-over-year, and others), but you do not have the Mark as Date Table feature. This article describes which scenarios are impacted and the possible workarounds. » Read more
International year_end_date for YTD functions in DAX

If you used the DATESYTD and TOTALYTD functions in DAX, you might have noticed that the optional parameter year_end_date is a string defining the last day of the year. This article describes what are the formats allowed in that parameter. » Read more
Year-to-date filtering weekdays in DAX

Time intelligence functions oftentimes hide an automatic ALL statement meant to make time intelligence calculations easier. This article describes this behavior and what to do in case it ends up breaking your calculation. » Read more

Other related functions are:

Contributors: Alberto Ferrari, Marco Russo