HTML5: How can I style my <header>, <footer> section into center position?

Question

I found that in HTML5, we need to use <header>, <footer> tag instead of <div> tag , better approach?

However, I can't find any solution to style the into center position?

Who can Help?

in CSS,

header{
???
???
}

Answer 1

header, footer {
   margin: auto;
   width: somePXvalue px;
}