Ruby wedding is a phrase used to describe a 40th wedding anniversary. However, there are many synonyms you can use to talk about a couple celebrating their 40th year of marriage. Some alternative phrases you could use include "40-year celebration," "longtime love," "veteran union," "forty-year milestone," and "ruby jubilee." Each of these phrases conveys a sense of accomplishment and longevity as a couple. Whether you are congratulating a pair of newlyweds or sharing in the joy of a couple who have been married for four decades, there are plenty of ways to express your feelings in words.