Happy Birthday everyone! It's Renri (Chinese:人日, literally Human Day) today.

According to Chinese culture, today is everyone's birthday! It's Renri (Chinese:人日, literally Human Day) today.

From http://en.wikipedia.org/wiki/Renri:

Renri (Chinese:人日, literally Human Day) refers specially to the 7th day of zhengyue (正月, the first month in the Chinese calendar). According to Chinese customs, renri was the day human beings were created. It is celebrated not only in China, but also other regions influenced by Chinese culture.

Happy Birthday everyone! or Happy Renri Day!