I can't succinctly put into words how parents lives are measured by the growth of their children. However, the panicked feeling of time flying by, is easily offset by the warm glow of pride in one's offspring and their bright, fresh, shiny lives.
Another milestone in her life, and ours. The passing years proving to us all, that nothing stays the same. That fact alone is worthy of celebration, all the more so when blessed with a beautiful, funny, intelligent young woman for a daughter.