How to center blog post date/author contents on mobile page?

For whatever reason, I can't get this problem figured out; I'm trying to center my post's date and author contents on my mobile page. I can get the corresponding post title to center itself fine with "text-align: center" (which I'm not using currently, until the other issue is sorted out).

I've tried using margin 0 auto, and text-align, but can't seem to make things work. For anyone wondering, the !important tag seems to have no bearing either - I'd prefer to leave that out. Also, I have been utilizing the appropriate media queries.

My site is: www.tylercharboneauprofessional.com/international-pulse/net-neutrality

Here is an HTML-structure snapshot:

Solution

This should work for you:

article header {
text-align: center;
}