Group same date in x-axis columns

I am trying to get all data from the same day collected in a single stacked bar, but I cannot seem to find a way to do so. I am graphing out the sum of items that occurred on a given day. However, because the events were at different times of the day, they are placed in their own buckets. Is there a way to have a stacked bar with the sum of items occurring on October 20 and the 21st (looking at the attached image).


And as soon as I submitted this question, I realized I could use the expression function and format the date! Sorry, all!!