When it comes to celebrating your sister’s birthday, it’s essential to convey your love and affection in a meaningful way. Instead of just saying, “Happy Birthday,” consider adding a personal touch. You could say, “To my dearest sister, Happy Birthday! May your day be filled with joy and laughter.” Birthday Wishes for Sister: When it comes to your heart, sisters always occupy a particular place because of all the many features they have. In certain ways, they may be both a parent ...