Say it with jewelry, like this sweet gold number from Caro.
Dress for it.
Say it with Art like Sally Benedict's work on paper.
Say it with a cake like this one from Bakerella.
Say it with flowers such as this huge bouquet of Baby's Breath from Rosenow Floral Design. Great idea, right? It's usually the first thing I remove from flowers sent my way but all group together in a mass, it's quite stunning.
Doesn't get much more simple yet sweet than these notes from Paper Source.
But by all means, celebrate it.