Not only do I volunteer for a non-profit, I work for a non-profit in the Boston area as well. This year my job decided to have a decorating contest amongst the different departments to celebrate the season. Now I know I can be a bit Martha Stewart around the holidays, but I really enjoy this friendly competition. It has been neat to see people collaborating with different ideas to come up with some great decorations, such as Faux Fireplaces, Nutcracker Suite, Ski Lodges, "It's a small world", etc. Even the people who don't think they have creativity, are enjoying the festive offices that are now around the building.
Since everyone has a chance to get involved, it also is a great way of celebrating the diverse amount of holidays that happen during this season. The winners get a pizza party for their office, and naturally bragging rights. Even if you don't win you may get a fun prize for participating, "The Green Award" - the most Eco-friendly design, "Martha Stewart Award"- most homemade crafts, "Charlie Brown Award"- most simplistic design.
So if you're a non-profit looking to incorporate the holidays around the office, I say give this a try - you may be surprised by the enthusiasm of your workers.