15 years of life, nephew! How time flies. I can hardly believe that 15 years ago you arrived in this world bringing so much joy to our family.
Enjoy your day, enjoy your party and don't forget to thank for the good things in life. You are a very special boy and I know you have a lot of good in your future.
Always do your best because I am sure that you will be very successful. Study hard to be someone in life and never forget that you can count on me for whatever comes.
Have a great birthday and a happy new year!