Thanks for replying. I will edit the index and try to install the plugin. But the thing is, I have already changed the date and time to my custom formats. They are showing up properly in the example, but when I made a post, it did not have the correct date format.
Edit: Not actually sure I need the plugin, I have probably phrased the question wrongly, but thank you anyway.
Another edit: That data already seems to be in the file. For some reason only the date is showing where the author and time should be. It is a theme issue however as the other theme did not have the same problem. I will keep trying to fix it, but I think I have the info I need. Thank you.