Mother's Day is kind of complicated, with new moms and old moms both being celebrated on the same day. So I did a quick Google to see if there was a Grandma's/Grandpa's day as well!
Turns out there is: in the US, Grandparents Day is "the first Sunday after Labor Day, in September. It falls on ... September 8, 2013." More on the day: "The holiday is expected to grow in significance over the next decade and beyond as the number of grandparents in the United States rises from 65 million in 2011 to 80 million in 2020 as a result of the baby boom. Grandparents in America are also increasingly responsible for child care and support. In 2012 30% of children under five with working mothers were cared for on a regular basis by a grandparent."
http://en.wikipedia.org/wiki/National_Grandparents_Day#United_States
Would you celebrate Grandparents Day? Once you become a Grandparent, would you want a separate day or would you want to still celebrate Mothers's/Father's Day?