Hi @Ricardo.Saraiva, I reached out to Docs team about this Doc and this is what I heard back. In the case of Business Journeys, the evenTimestamp field should be present or Business Journeys will not work. If you plan on using Custom Events while defining Business Journey, the custom events should send eventTimestamp field. If they don't, only the Business Journeys will not work.  Let me know if that helps. ... View more