For the first three years of my life, I lived with and was primarily raised by my grandparents. While I was always grateful for the experience, I never realized until I was a parent myself of the depths of their sacrifice, and the burden and stress raising an infant put on them.

Like many other seniors, they didn’t get the credit or recognition they deserved for being caregivers. This role of grandparents is often overlooked, despite the fact that in 2013 10 percent of children in the U.S. (7.1 million) lived with a grandparent.

According to the Census Bureau, in 2012 2.7 million grandparents were responsible for the basic needs of one or more grandchildren under age 18 living with them. Of these caregivers, 1.7 million were grandmothers and 1.0 million were grandfathers. Out of that caregiver group, 603,118 grandparents had es below the poverty line, 674,936 had a disability, and 1.6 million were still in the labor force.

On Sunday, Americans will celebrate National Grandparents Day, an annual holiday established by presidential proclamation in 1978 to celebrate and honor of our nation’s grandparents. Let’s take the opportunity this weekend to let all grandparents — whether our own or others — know that we recognize and appreciate the vital role they play in sustaining our families.