I was browsing through the website to see what kind of things they do. There is so many categories to pick from, birthdays to thank you to save date, the company is American based so there is more specific holiday themed cards like Diwali, Lunar New Year and Hanukkah. They have also done collaborations with other known brands like: Kate Spade New York (I just love the designs), Rifle Paper Co and Oscar De La Renta.
I have sent a card already, it's so simply to do!