---
title: DATEADD
slug: segment/dateadd
docTags: 
createdAt: 2026-01-19T00:24:58.573Z
---

DATEADD can be used in the Custom Values section (Output step) using the Custom Value > Apply formula to a field > Transform date. 



**Example:** You want to give a voucher to customers on their birthday, that would be valid on the next 30 days. You want to create a field with the expiration date, by adding 30 days to the customer's birthday

![](https://support.deselect.com/hc/article_attachments/5872515958929)