You know what’s best about Memorial Day Weekend? It isn’t the amount of ketchuped and mustarded food. It isn’t the family time (sorry, guys). And it isn’t the neighborhood, suddenly alive with screaming kids. It’s the chance to wear your sweet new summer dresses and flirty new swimsuit. Duh. But I also like Memorial Day sales. I have no idea why stores feel like they have to put stuff on sale for holidays like Memorial Day, but I love it. Head to Hemline through Saturday and check out the 50 percent-off rack filled with tops, tunics, and… I can’t think of another “t” word, so, um, dresses.