Problems reporting feeds date/ time

I had to give up using HootSuite because it told me my feeds for my site (https://thisaintnarnia.com) were not reporting a date or time. I thought nothing off it and shook it off.

The problem has arisen again lately so I thought to look further into it. First I thought the problem was with FeedBurner, but I still have the problem with a naked WP formatted feed.

Did I miss something? I cannot find any questions of this sort and i doubt I am the only one with it. Did something format improperly? Am I missing a plug-in?

Can anyone help me?!

(the specific error I get from HootSuite is: “Feeds must be configured so that posted items report a date/time.”, other problems are the same thing just worded differently”