Way to add same release year for multiple episodes of a series

I would like to know if there was a way to add same release for a series of episodes in one go, as it requires that some kind of release date be needed for an episode if one needed to rate it. If i were to edit every episode individually for a series with 1.5k+ eps that would so time consuming, please tell me if anyone reading this message knows of anyway. It would be really helpful.