Article - Remove the date or author of an article

1. From the left menu, go to My app > Structure
2. Click the three dots next to the section on "Modify design"
3. Click on "Edit design" on Article
 

Scroll down to the bottom of the page, to the HTML Code field. 

1. Delete exactly the portion of the code <div class="date">Written on [DATE]</div> in the HTML Code field
2. Click OK.

1. Delete exactly the portion of code <div class="author">[AUTHOR]</div> in the HTML Code field
2. Click OK.