Noel 2003 provides Christmas-themed icons to decorate your desktop.
To use these icons, simply select the one you want and open its info window by clicking on "File" and selecting "Get Info", or using the shortcut "command-i". In the info window, click once on the icon in the top left corner, and then copy it using "Edit" and "Copy", or "command-c".
Next, select the file or folder that you want to replace the icon for and open its info window. Then, choose the old icon in the top left of the info window and paste the new one into place using "Edit" and "Paste", or "command-v".
Overall, the Noel 2003 icon set and similar offerings are a great way to add some personality to your desktop and customize your Mac experience.