NORFOLK, Va. (WVEC/ABC) -- Many called it the luckiest date in a decade, and it was exactly 10 years ago today.

Back then July 7, 2007 -- 7/7/07 -- was seen as a perfect day for a wedding, or at the very least, hitting the slots and hoping to score Triple 7's.

It goes back to ancient Greece and the mathematician Pythagoras, who decreed the number seven lucky, which would cement in Western culture a belief that also reigns in Asian and the Middle East.

Back in 2007, wedding-planning website reported 38,000 couples had registered July 7 as their wedding date, more than triple the number of couples getting married on any other day of the year.

"That concentration will make it the single largest wedding day in American history," declared founder and editor Carley Roney at the time.

Not everyone at the time thought 7/7/07 was the ideal wedding date, however. Ellin Dodge, a numerologist and author of "Numerology Has Your Number," said July 7 wasn't an ideal day to get married. If anything, it's unlucky.

"Numerologically, it's considered a day for freedom, restlessness, gambling and doing things unconventionally... weddings are a convention," she said. "It's a day when plans are made to be broken. But if you can handle things not going according to schedule, like the best man showing up late, then OK."

A lot has happened in the 10 years since, from two new U.S. presidents to the smart phone revolution. But there was only one 7-7-07, a day for luck -- whether good or bad -- that may not be eclipsed for some time to come... at least, not until 7/7/77, that is.