Get a new holiday screen saver for every day of the season by downloading appropriate programs from sites such as NewFreeScreenSavers.com or AmericanGreetings.com and changing the default setting on your computer each day, as of 2015. Change the screen saver on a Windows computer through the Screen Saver section of the Control Panel, or by accessing the same option in the System Preferences menu on a Mac.
Many sites that offer free or paid screen savers feature a seasonal section that includes themes appropriate to the current holiday, though some major holidays may have a perpetual section on the site. These sites typically require you to download the screen saver program to your computer before you are able use it, with some also requiring additional installation steps such as extracting it from a ZIP file.
To change the screen saver on a Windows computer, right click on the Start icon and choose Control Panel from the list of options. Select the Turn Screen Saver On or Off option from the menu, select the screen saver you want, and click OK. The process for Mac users involves opening the System Preferences panel, clicking on the Screen Saver option from the Desktop & Screen Saver icon and selecting a screen saver from the available options.