---
title: "GetIso8601WeekOfYear"
slug: "getiso8601weekofyear"
updated: 2024-04-16T11:16:20Z
published: 2024-04-16T11:16:20Z
canonical: "help.mail-and-deploy.com/getiso8601weekofyear"
---

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# GetIso8601WeekOfYear

### General

This function returns a Number that contains the week of year according to ISO 8601 for a given Date-Time.

### Syntax

You can call the GetIso8601WeekOfYear function using the following syntax:

          GetIso8601WeekOfYear Function Syntax

          

GetIso8601WeekOfYear(<datetime>)

The parameters of the function are:

| Name | Description |
| --- | --- |
| datetime | The Date-Time for which to return the week of year. |

### Examples

The following expression returns the week of year for the current date-time:

          GetIso8601WeekOfYear Function Example

          

GetIso8601WeekOfYear(DateTime.Today)