Where oh where did summertime go? Even though the weather will likely remain warm for at least another month, the calendar tells us it’s the end of summer — marked by the arrival of Labor Day. The long weekend pleads for one more picnic, one more barbecue, one more nap in the hammock. Then vacation is over. Labor Day traditionally means it’s time to put away the white shoes, deflate the pool floats, pull out the marigolds and plant mums. But Labor Day wasn’t established...