---
title: date.week() function
description: date.week() returns the ISO week of the year for a specified time. Results range from [1 - 53].
url: https://docs.influxdata.com/flux/v0/stdlib/date/week/
estimated_tokens: 1225
product: Flux
version: v0
---

# date.week() function

-   Flux 0.37.0+
-   View InfluxDB support

`date.week()` returns the ISO week of the year for a specified time. Results range from `[1 - 53]`.

##### Function type signature

```js
(t: A, ?location: {zone: string, offset: duration}) => int where A: Timeable
```

For more information, see [Function type signatures](/flux/v0/function-type-signatures/).

## Parameters

### t

(Required) Time to operate on.

Use an absolute time, relative duration, or integer. Durations are relative to `now()`.

### location

Location used to determine timezone. Default is the `location` option.

## Examples

-   [Return the week of the year](#return-the-week-of-the-year)
-   [Return the week of the year using a relative duration](#return-the-week-of-the-year-using-a-relative-duration)
-   [Return the current week of the year](#return-the-current-week-of-the-year)

### Return the week of the year

```js
import "date"

date.week(t: 2020-02-11T12:21:03.29353494Z)// Returns 7

```

### Return the week of the year using a relative duration

```js
import "date"

option now = () => 2020-02-11T12:21:03.29353494Z

date.week(t: -12d)// Returns 42

```

### Return the current week of the year

```js
import "date"

date.week(t: now())
```

[date/time](/flux/v0/tags/date/time/)