how does one say "happy valentines day" in thai?

Every weekday, as I drop my kiddo off at preschool, I see a long line of street hawkers with their carts, just meters outside of the compound gates. They typically are selling fried chicken, squid, tropical fruit that I have to admit looks fabulous, noodles, and cold drinks. Today, though, several of the enterprising hawkers had expanded their product lines and their carts were sporting bouquets of roses in pinks and reds.

An acquaintance of mine frequently uses the phrase "thai-light zone" for describing things like this, and I'm starting to realize that the expression fits really well.