92 Days Until Your Wedding Day!
I looked up the meaning of this poem to find out a bit on its tradition and found out that there is another line which reads "And a silver sixpence in her shoe". The following explains its tradition according to

Each item in this poem represents a good-luck token for the bride. If she carries all of them on her wedding day, her marriage will be happy.
"Something old" symbolizes continuity with the bride's family and the past.
"Something new" means optimism and hope for the Bride's new life ahead.
"Something borrowed" is usually an item from a happily married friend or family member, whose good fortune in marriage is supposed to carry over to the new Bride. The borrowed item also reminds the Bride that she can depend on her friends and family.
As for the colorful item, blue has been connected to weddings for centuries. In ancient Rome Brides wore blue to symbolize love, modesty, and fidelity. Christianity has long dressed the Virgin Mary in blue, so purity was associated with the color. Before the late 19th century, blue was a popular color for wedding gowns, as evidenced in proverbs like, "Marry in blue, lover be true."

And finally, a silver sixpence in the bride's shoe represents wealth and financial security. It may date back to a Scottish custom of a groom putting a silver coin under his foot for good luck. For optimum fortune, the sixpence should be in the left shoe. These days, a dime or a copper penny is sometimes substituted, and many companies sell keepsake sixpences for weddings.

In more modern times, the Bride often recognizes either her gown, veil, or headpiece as "new" unless either one of them have been borrowed. A pendant from a loved one who has passed away could be put onto the bouquet as the "something old" and jewelry is most popularly the "borrowed" item. Girls have also been known to wear blue shoes or petticoats under their gowns.

Now we know :)

Danielle @ PARADISE

About the author: Danielle works as a Bridal Sales Consultant at PARADISE Bridals & Tuxedos, and is also a co-founder of "The Bride's Maids", a wedding planning business in Long Island, that she co-founded with Stephanie.