All pics: Happy Birthday!
(another method is described at the bottom of the page)
Here variation - I wish you a Happy Birthday! Have a great time today!.
The site has other free pictures with and without names.
How to download the picture?
Hover your mouse over the image, right click. A window will appear in which you need to select 'Save image ...', 'Save image as ...' or 'save image as ...' (in different browsers in different ways). You will then be given the opportunity to choose a location to save the image, select it and click 'Save'.