There is NO date certain as to what defines a baby boomer in our culture. I never considered myself a boomer since I was born in late 1943, but some do. What difference does it really make?
"The term "baby boomer" is also used in a cultural context. Therefore, it is impossible to achieve broad consensus of a precise date definition, even within a given territory. Different groups, organizations, individuals, and scholars may have widely varying opinions on what constitutes a baby boomer, both technically and culturally."