Press the green flag, and the program will automagically calculate the age of the Scratch versions (most of them). Come on a birthday to see a celebration! Press the "O" key to pretend there is a birthday (or if it is your birthday!) If you notice a bug, particularly with the age calculation, feel free to let me know (with relevant info, please!).
I'm pretty sure the calculation is correct. It will update whenever you hit the green flag! Credits to @medIans for inventing Scratch 2.0! Wonderful voice acting by yours truly. Please don't poke Gobo's friends. Feel free to remix if you'd like.