Rightly Opinionated

I haven't finished this layout, but I'sm anxious to post it to get an answer to my question. This past December 27 was the very first time I ever saw a 'red' sky to the south of us. It looked just like a sunset, but it was in the south instead of in the west. The only red skies I'm familiar with are the sunrises and sunsets. I hope that someone sees this and is able to tell me why it would be red in the south? All pictures were taken at 7:37 PM December 27, 2020.