You deserve more than one greeting on your birthday, so I am sending you another beforehand this year. Advance happy birthday sister.
Your friend will remember your birthday on the date, but your sibling will remember it beforehand. Sending you an early birthday wish and a pretty present because I love you very much, sister. Have fun.
You deserve a wonderful birthday celebration because you are my sister and the most amazing person in the world. Happy Advance Birthday dear sissy.
You are annoying, but I still love you so much dear sister. Wishing you a very happy birthday in advance, and I hope you will enjoy your special day to the fullest.
I cannot afford to be late wishing you on your birthday. So, I am wishing you early this year. Advance happy birthday dear sister.