Change date format in Adelle theme

I want to change the format of the post date but can’t work out how to do it, my site is http://www.lifecooks.com.au. I am working on a child theme as I’ve changed a number of other formatting options.

I don’t want to appear inside a shape, but just read like a sentence on one line and I can’t work out the code to do it.

I would like it to appear similar to how it does on this site, but in Open Sans font that I am using for the rest of the site: http://girllostinthecity.com/

I’ve tried a bunch of different code options, but can’t work it out. Is anyone able to offer some advice?