This evening I opened my door to discover my parents standing on the front doorstep. I knew they were coming, but didn’t expect them until tomorrow. The mix-up was due to my own faulty internal math. It went like this. “Parents are leaving their house on Tuesday. They’ll spend a night on the road. This means they’ll arrive on Thursday.” Somehow my brain skipped Wednesday in the calculation. Anyway they’re here now and they’ll be staying for a week. The kids are all thrilled. Having Grandma and Grandpa just show up is about the coolest thing ever.