(Martha Stewart Weddings) — Ever wondered why a bride wears a veil or how a “something borrowed” has become a wedding-day must-have? We’ve rounded up the most common and surprising wedding superstitions and traditions and the reasons behind them.

Something Old, New, Borrowed, and Blue
We’ve all heard this common rhyme used when someone gets married, but what does it mean? Wearing “something old” represents the bride’s past, while the “something new” symbolizes the couple’s happy future. The bride is supposed to get her “something borrowed” from someone who is happily married in the hope that some of that person’s good fortune rubs off on her. “Something blue” denotes fidelity and love.

Wearing a Veil
This custom originated in Rome, when a bride would wear a veil down the aisle to disguise herself from evil spirits who were jealous of her happiness.
Seeing Each Other Before The Wedding
This superstition dates back to the time of arranged marriages, when people believed that if the couple saw each other before the ceremony, it would give them a chance to change their minds about the wedding. Today, however, many couples choose to meet up and even have portrait sessions before saying their “I dos.”

Rain on Your Wedding Day
In some cultures, rain on your wedding day symbolizes fertility and cleansing. This couple’s wedding was interrupted by a torrential downpour, and nine months to the day of the wedding, their daughter was born.

Knives as Wedding Gifts
According to folklore, a knife signifies a broken relationship and is bad luck to give as a wedding gift. If knives are on your registry, just give the gift giver a penny. That way it’s a purchase, not a gift.

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Carrying the Bride Over the Threshold
This superstition began in Medieval Europe where many believed that a bride was extra vulnerable to evil spirits through the soles of her feet. To avoid bringing in any evil spirits, the groom carried the bride into their new home.

A Spider On Your Wedding Dress
Finding an eight-legged creature on your gorgeous gown might seem like a wedding-day nightmare, but English lore claims that finding a spider in your wedding dress is a good omen.

Using Your Married Name Before the Wedding
Some think it is tempting fate for the bride to write out her married name or monogram before she’s actually married, and that the wedding will not take place if she does so. If you’re superstitious, save the monogramming for your reception decor and registry items.

Crossing a Nun or Monk’s Path
A bride who sees a nun or a monk on the way to her wedding is said to be cursed with a barren life dependent on charity.

Ringing Bells
Bells are traditionally chimed at Irish weddings to keep evil spirits away and to ensure a harmonious family life. Some Irish brides even carry small bells in their bouquets as a reminder of their sacred wedding vows, and they are a common gift for newlyweds.

Breaking Glass
In Italy, many newlyweds smash a vase or glass at their wedding, and they put a lot of muscle into it, too. The tradition says that however many pieces the glassware breaks into will symbolize how many years they’ll be happily married.

Crying on Your Wedding Day
It is supposed to be good luck for the bride to cry on her wedding day because it symbolizes that she has shed all her tears and will not have any to shed during her marriage. So go ahead and get teary-eyed. Just be sure to wear some waterproof mascara.

VIA 11 wedding superstitions and traditions explained – CNN.com.