why do newlyweds put cans on their car

[SanCorbin]

The tradition of tying cans to a newlyweds' car is a long-standing Western custom, primarily an American one, symbolizing a public celebration and wishing the couple good luck on their journey into married life. It’s a loud, visual announcement of their new status meant to ward off evil spirits and bring prosperity. The specific practice of using cans is believed to have evolved from earlier, more disruptive traditions like the "shivaree," a noisy charivari meant to bother the couple, which transformed into a more lighthearted and celebratory gesture.

The act itself is rich with symbolism. The noisy clattering of the cans is thought to scare away any lingering evil spirits or bad luck that might follow the couple as they depart. Furthermore, the act of "tying the knot" with the string that secures the cans is a direct, physical metaphor for the marital bond the couple has just formed. While the "just married" sign directs the public's attention, the cans provide the auditory component of the celebration.

This custom saw a massive surge in popularity after World War II. As car travel became the norm for honeymoons and post-wedding getaways, the practice became a staple of American wedding culture. Today, it's often done more for fun and photo opportunities than for superstitious belief, with many couples using specially designed magnetic decals or ribbons to avoid damaging the car's finish, showing how traditions adapt over time.

Aspect of Tradition	Symbolic Meaning & Evolution	Key Historical Notes
Primary Symbolism	Public celebration, noise to ward off evil spirits, wish for good luck.	Evolved from noisemaking traditions to a specific automotive ritual.
The "Knot" Metaphor	Directly represents the couple "tying the knot" and their new bond.	The string used to tie the cans reinforces the wedding ceremony's symbolism.
Predecessor Ritual	The "shivaree" or charivari, a noisy mock serenade for newlyweds.	This was often a rowdier, more mischievous event held outside the newlyweds' home.
Peak Popularity Era	Post-World War II (1950s).	Coincided with the rise of automobile culture and the classic American road trip honeymoon.
Modern Adaptations	Use of magnetic signs, ribbons, or eco-friendly alternatives to metal cans.	Driven by concerns for vehicle safety, noise ordinances, and environmental consciousness.

[AdelynFitz]

It’s basically a really old-fashioned way to make some noise and say, “Hey, look at us, we just got hitched!” Back in the day, people thought loud noises scared off bad luck or evil spirits. So instead of throwing a big party right after the wedding, you’d just send the couple off with their own personal parade of clatter. These days, it’s just a fun, silly tradition. Most people know it’s not really going to change their luck, but it makes for great pictures and lets everyone share in the excitement as the couple drives away.

[MatteoDella]

I see it as a physical metaphor. The couple has just "tied the knot" in the ceremony, and then their friends and family literally tie a knot around the bumper with a string of cans. The noise celebrates the joy of the union, but it’s also a community’s way of marking a major life transition. It’s a send-off, a ritual that says, “Your life as a single person is over, and your new journey together has begun.” It turns a private departure into a shared, public moment of well-wishing.