# DATESINPERIOD Function (DAX)

Returns a table that contains a column of dates that begins with the start_date and continues for the specified number_of_intervals.

## Syntax

```
DATESINPERIOD(<dates>,<start_date>,<number_of_intervals>,<interval>)
```

## Parameters

Term |
Definition |

dates |
A column that contains dates. |

start_date |
A date expression. |

number_of_intervals |
An integer that specifies the number of intervals to add to or subtract from the dates. |

interval |
The interval by which to shift the dates. The value for interval can be one of the following: year, quarter, month, day |

## Return Value

A table containing a single column of date values.

## Remarks

Note

To understand more about how context affects the results of formulas, see Context in DAX Formulas.

The dates argument can be any of the following:

A reference to a date/time column,

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.

Note

Constraints on Boolean expressions are described in the topic, CALCULATE Function (DAX).

If the number specified for number_of_intervals is positive, the dates are moved forward in time; if the number is negative, the dates are shifted back in time.

The interval parameter is an enumeration, not a set of strings; therefore values should not be enclosed in quotation marks. Also, the values: year, quarter, month, day should be spelled in full when using them.

The result table includes only dates that appear in the values of the underlying table column.

## Example

The following formula returns the Internet sales for the 21 days prior to August 24, 2003.

```
= CALCULATE(SUM(InternetSales_USD[SalesAmount_USD]),DATESINPERIOD(DateTime[DateKey],DATE(2003,08,24),-21,day))
```

## See Also