Walk into most preschool classrooms in America, and you’re sure to see it: that oversized calendar near the floor, accessible to four-year olds, where children are led through a recitation of the days of the week and the months of the year, as well as a counting of the dates in the month. From an early age, especially in this country, we’re determined to understand and focus on the passage of time. Many Europeans chuckle over our obsession with timeliness, and folks from South America and Africa