How can I change the format of the date circled in blue below.  This is the date for the summarize by date option chosen in the Sort and Total options.

Also, how can I add text to the Subtotal field?  I want to add "Subtotal for DDDD, MMMM, D, YYYY."  I've used a drawing program to put it in above the blue line in the picture below.  But I want to design a layout that will be like that.

I hope someone can help me.