Hi Brittani,
It can be a little confusing, but unlike WixDataQuery and WixDataAggregate, WixDateFilter (or the setFilter command) does not return a result object. From the documentation: “Fulfilled - When the filter has been set. Rejected - An error object.”
I saw some of your other recent posts and I wanted to comment but was too busy to respond in a way that would have been helpful. For your first coding project, you have chosen something that is definitely not a beginner’s task and may not even be an intermediate level programming challenge.