The notion that Mother’s Day is exclusively for mothers only may be a dying one—though many parents are not letting the idea go without a fight. Lately, the word “mom” has expanded beyond its traditional meaning, with many arguing that society should celebrate mothers of all kinds on May 10. Women who don't have children of their own are sharing their experiences, arguing that being a “dog mom” or “plant mom” for example shouldn't be shrugged off as a novelty. Many told Newsweek it reflects a