The Internet celebrates National Cat Day

It's National Cat Day, and cat lovers are marking the day by posting adorable cat photos on the Internet, which is not that much different than any other day of the year.

Uber teamed up with the ASPCA to run one of their most popular promotions, Uber Kittens. The ride service was delivering adoptable kittens for 15-minute petting sessions in select U.S. cities. All proceeds went to animal shelters.