What does the English translation smooth valentine‘s day mean?

Smooth Valentine's Day (Valentine's Day without beard)

This is an advertising idea to sell razors. What's the connection between razors and Valentine's Day? On Valentine's Day, Wilkinson Sword set up a large billboard, showing half of a man's face covered with stubble. These seemingly annoying and stinging beards are actually roses that represent love and are in bud.

Valentine's Day

Valentine's Day; Happy Valentine's Day;

Example

1. "You'll find out on Valentine's Day." He said with a knowing smile.

"You will know it on Valentine's Day." He said with a smile.

2. I'm going to ask her to marry me on St. Valentine's Day.

I'm going to propose to her on Valentine's Day.