Happy Birthday Sister Meme : The hardest thing to do is to look for the perfect gift for people close to you, like your sister. One simple way to show them that you care is by making sure that their birthday is memorable. Your sister is one of the best people in your life for sure. She is the one who is always there for you when you need someone to listen to you or someone to lean on when you have a big problem that you do not know how to solve. She is the one who has guided you through life, who stuck with you even through the hardest moments of your life.