The New Year's Kiss - don't forget to kiss the person you love at midnight or at January 1. It's more than a celebration, its the first kiss of many kisses between you and the one you love for the new year.
from snopes its called
Kissing at midnight: We kiss those dearest to us at midnight not only to share a moment of celebration with our favorite people, but also to ensure those affections and ties will continue throughout the next twelve months. To fail to smooch our significant others at the stroke of twelve would be to set the stage for a year of coldness.
Happy New Years