We'll show you how to make small adjustments to the widget code to customize the appearance of the streams on your website
To add a date and/or category filter, you only need to make minimal adjustments to the widget code.
Simply add the following parameters to your code:
&showCategoryFilter=true
&showStartEndDate=true
Under the point "Category & date filter" in the following article How to create the widget codes yourself we will explain you exactly how it works.