If you use Pinterest, you’re already well aware the visual social network is teeming with signs of the holidays, from gift ideas to Christmas cookie recipes to DIY crafts. You may have seen Pinterest’s interactive calendar, 30 Days of Pinspiration, curated by power users, brands and non-profits to guide holiday inspiration.

What you may not have realized, is the calendar is part of a company-driven effort to promote giving back during the holidays. While some of the pinners, like Katie Couric, share recipes, and others, like Nina Garcia, share holiday party outfit tips, others embrace the spirit of giving by sharing volunteer opportunities and charitable gifts