Is there something about getting married at a certain time?

I think I remember reading somewhere that it was bad luck to get married on the down swing of the clock? Do I have it right? If, so where did it originate?

Thanks in Advance

I don't remember how it goes or how it started but I think 'they' say weddings should start on the half hour as the clock hands are moving up because moving up is more positive or shows good fortune vs moving down towards the 6 which is considered negative.

It's kind of interesting but it's not something we thought about.