A 40th wedding anniversary, often called the "Ruby Anniversary," marks four decades of marriage. Traditionally, this milestone is celebrated with gifts made of rubies, symbolizing love and passion. Couples often reflect on their journey together, celebrating the memories and experiences they have shared over the years. Celebrations can vary widely, from intimate gatherings with family and friends to grand parties. Many couples choose to renew their vows, reaffirming their commitment to each other. This anniversary is a significant occasion, highlighting the strength and endurance of a long-lasting relationship, often inspiring others in their own marriages.