”What time is it?” Sometimes I’m asked that question by a complete stranger. It’s an easy question to answer. I just check my phone or watch, and I state the time. But no stranger has ever asked me, “What is time itself?” That’s a much more complex question to answer. On the one hand, we know what time is, because we use it every day. We start our day with an alarm buzzing, we check the clock throughout the day to be sure we’re on schedule, and we go to bed hoping we get several hours of sleep. We also know that time has a cumulative effect. Children grow up and become adults. Relationships change. Seasons pass.