Your birthday can’t come soon enough as I just cannot wait any longer to celebrate with you, my friend! We’ll have to have a pre-celebration to welcome it in before!
May you have the happiest birthday possible today and, as you near ever closer to finishing your studies, I’m wishing you all the success you deserve for the future.
Celebrating your birthday is especially important because you’re not just my sister-in-law, but a true sister and a thoughtful friend. May you have a special and touching birthday.