# Tracking conversion start time, end time, and duration - HandL UTM Grabber Guide

## UTM attribution overview

This guide explains Tracking conversion start time, end time, and duration - HandL UTM Grabber Guide. It helps you capture UTM source, medium, campaign, term, content, click IDs, referrer, and landing page data and keep the marketing context needed for accurate reporting across forms, bookings, signups, and sales.

Using our custom version, you can track the start time, end time, and duration of your conversions.

Please request the custom version via chat, and we'll provide it to you.

After you activate the custom version, you will have three additional cookies (parameters) added:

1. **Tracking conversion start time, end time, and duration:**
   - **handl_journey_start:** This is an <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/now" target="_blank">epoch</a> timestamp in milliseconds indicating when the user started the journey for the first time.
   - **handl_journey_end:** This is an <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/now" target="_blank">epoch</a> timestamp in milliseconds indicating when the user ended the journey for the first time.
   - **handl_journey_duration_hrs:** This is the duration of the conversion in hours (rounded).

Please let us know if you have any further questions.