Hallmark has a card for every occasion. EVERY occasion. You're the person tasked with finding and writing the most obscure ones.

Flossing.. Always flossing. There's only so many ways to congratulate a person on flossing, it's doubly hard when you're talking about a flossing anniversary.

A five years of dilgent flossing should be celebrated I suppose, I cannot complain too much because I am getting my commission on each sale but still. These subjects are dreadful.

What emotion can this card get across about flossing. I just have major writers block. 

"Flossing four five years: Good for you!"

"Happy Flossing Day: Five Years Strong!" 

I just have no idea what it should be and I need to think. I always think better when I floss..