In this paper, we investigate many types of stability, like uniform stability, asymptotic stability, uniform asymptotic stability, global stability, global asymptotic stability, exponential stability, uniform exponential stability, of the homogeneous first-order linear dynamic equations of the form x(Delta)(t) = Ax(t), t > t(0), t, t(0) is an element of T x(t(0)) = x(0) is an element of D(A), where A is the generator of a C-0-semigroup {T(t) : t is an element of T} subset of L(X), the space of all bounded linear operators from a Banach space X into itself. Here, T subset of R->= 0 is a time scale which is an additive semigroup with the property that a - b is an element of T for any a, b is an element of T such that a > b. Finally, we give an illustrative example for a nonregressive homogeneous first-order linear dynamic equation and we investigate its stability.