In Roman celebrations, the god Janus plays a significant role as the deity of doorways and beginnings. His two-faced representation symbolizes transitions—both the start and end of an era. Janus is invoked during various festivals to mark moments of change, such as the new year. His significance highlights the importance of reflection on past experiences while looking forward to new opportunities. In this way, Janus embodies the cyclical nature of time and the balance between continuity and change.