There is nothing special about living another 365 days though.
We should and most people do say thanks for stuff but appreciation day is special because we will say thanks regardless of whether somebody did something recently for us or not we'll be saying thanks to people for simply seeing them. If you want to take it even further you can think about all the things we take for granted in our lives, like saying thanks to the billions of transistors in our CPU, taps that spurt out clean water or the billions of bacteria that live in our body and keep us alive. Things we'd never even think about on a daily basis.