Problem or bug with trigger: Date in an attribute occurs

We are storing the date on which the trial of a contact ends as a custom parameter. We are running an automation, which should send an email to a customer 7 days before the date occurs.

But the automation starts not 7 days before the date occurs, but 7 days after the date occurs. Did anyone else experience this, is this a bug, or maybe only worded in a way that can be misunderstood and it is correct, that way?

Hi @janpeini , thanks for posting on this community.

Could you post a screenshot about what you’ve put in place, so that we understand what could be wrong?