Stuck on what to say? Here’s what to write in a birthday card for a friend, coworker or that special someone in your life.

but many folks have trouble figuring out what to write in a birthday card other than the obvious 'happy birthday' phrase. Thankfully, finding the right birthday card messages is a piece of cake!

We know you can write a whole book about why you love her, but if you need something short and sweet for her birthday card, look no further than these best birthday wishes for your sister.