What is what does happy heavenly birthday mean?

Happy heavenly birthday is a term used to celebrate the birthday of someone who has passed away. It is a way to remember them and celebrate their life even though they are no longer with us on earth. The term "heavenly" refers to the belief that the person is in a better place and at peace in heaven. It is often used by loved ones to express their love and remembrance for the departed person and to honor their memory.