There are a lot of different graphic files out there that people can use; this is the same with Happy Birthday SVG files. Just enter “Happy Birthday” into your favorite search engine and you will have a lot of options. If you are looking for something to use, you can search the Internet for a file whether you are making invitations, printing an edible picture for a cake or a banner to hang on the wall.
Adobe is how you create these files and you will need something in the Adobe world in order to open these files but then you can do whatever you like with them. If you do not have Adobe, you can find a free copy on the Internet but you will be limited in what you can do. But it will be enough for you to be able to open the graphic and print your birthday SVG files.