By using the Friends Holiday style (skin) as your choice for viewing the forum!
It's a fun change!
For those who are unsure of how to do this: Scroll all the way to the bottom of the page. At the very bottom left corner, there is a drop down menu box that allows you to change the style you view.
There are several to choose from.
You can make your choice permanent everytime you log in by going into your User CP, Edit Options. The very last section: Miscellaneous Options, allows you to choose from there as well.
Make your skin choice, and click on the 'save changes' button at the bottom of the page.