A set of 15 flat Christmas icons are just a download away, featuring Christmas lights and stocking, mistletoe, Santa and elf hats and many others. The graphic material is free, available at its source, on Behance.
You can easily access them if you click on the image below. The designer is Fabio Di Corleto, 22 years old, graduate of New Technologies of Art at the Academy of Fine Arts in Naples.
You can check out his entire Behance portfolio for further references.
I hope these icons will help your digital design projects. Good luck!