All these years I thought Generation X was my generation. The defining years for baby boomers when I grew up ended in 1959. Turns out the definition changed to 1964 even though I suspect this definition was changed so Boomers could claim Obama as one of their own. I learned this because the New York Times has asked me to be a regular contributing illustrator for Booming, a special online section of the Times for Baby Boomers. Fred Norgaard, AD.