RSS Icon (or link) is an integral part of every blog. If changing theme / look of your Blogger blog or Wordpress blog is too much of an ask, then go for Christmas RSS Icon.
Using this, you can add dash of Christmas to your blog without much need of editing in your blog template or theme. Checkout pack of free RSS icons from AjaxDigest. Icon pack is available in three formats: with black background, transparent background and white background. Download RSS icon pack