# dayOfWeek {#dayofweek}

**Parent topic:**[Functions](../../Functions/category.md)

## Syntax {#syntax}

`dayOfWeek(X)`

## Arguments {#arguments}

**X** is a scalar/vector of type DATE, DATETIME, DATEHOUR, TIMESTAMP or NANOTIMESTAMP.

## Details {#details}

Return which day of the week is *X*.

**Return value**: an integer from 0 to 6, where 0 means Monday, .., 6 means Sunday.

## Examples {#examples}

```
dayOfWeek(2012.12.05);
// output: 2

dayOfWeek 2013.05.23T12:00:00;
// output: 3

dayOfWeek(2014.01.11T23:04:28.113);
// output: 5

dayOfWeek(2012.12.05 2012.12.06 2013.01.05);
// output: [2,3,4]
```

