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

# ISO Calendar

The ISO Calendar is a pretty basic source that gives you every date as a row of data within an interval that you define. It can be helpful as a mapping table for other data sources.The dataset looks like this:

<Frame>
  <img src="https://mintcdn.com/less-51/7hAaZrB-cL9KB8SD/images/sources/sources/iso/data.png?fit=max&auto=format&n=7hAaZrB-cL9KB8SD&q=85&s=6fef8b611d8eb0620be99cb4c59d2e83" width="3488" height="644" data-path="images/sources/sources/iso/data.png" />
</Frame>

### Setup

The only step is input the **interval**. Here you need to input the number of years you want to look back and look forward. This is used to create the interval of dates. Every time the source is run, it will create a new dataset with the dates in the interval.