---
url: /cube-functions/weeknum.md
description: Returns the week number of a given date based on a specified type of week.
---

# WEEKNUM 

Returns the week number of a given date based on a specified type of week.

```js
WEEKNUM(date, return_type)
```

#### Parameters

* `date` - The date to return the week number for, represented as an Excel date value.
* `return_type` - An optional argument specifying the type of week numbering system to use. See Excel docs for more return types. `(optional)`

#### Examples

```js
WEEKNUM(44197)

```

**Result:** `1`

**Note:** Returns the week number for January 1, 2021, using the default week numbering system that starts on Sunday.

```js
WEEKNUM("2022-04-17", 2)

```

**Result:** `16`

**Note:** Returns the week number for April 17, 2022, using the ISO week numbering system that starts on Monday.