> ## Documentation Index
> Fetch the complete documentation index at: https://www.integrate.io/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# ETL: IsISODatetime

> Check whether a string expression conforms to ISO 8601 date time format. Returns true or false for date validation in Integrate.io ETL pipelines.

## Description

Checks if a string expression is in ISO 8601 date time format.

## Syntax

`IsISODatetime(string_expression)`

## Examples

`IsISODatetime('aksjhfkasjhfkjashf')` returns false.

`IsISODatetime('1997-07-16T19:20:30+01:00')` returns true.

## Return value datatype

Boolean

## Impact of null value

If input is null, returns null.