December 30, 2011 never happened in Samoa. The island nation in the South Pacific skipped this day, to move ahead into a different time zone. We change our clocks to start and stop daylight saving time. We travel across time zones. Time, in many ways, is a human construct. We have chosen ways to measure it, to parse it out, to track it. But time is also an experience that can vary wildly from one moment to the next — the minutes that stretch endlessly, the hours that fly by. On this episode, we explore time — how we measure it, how we experience it, and how it bends and warps in our minds.

Also heard on this week’s episode:

• What is time, really? It depends on whom you ask! It could be measured in the time it takes to cook rice, or down to the millisecond, as measured by an atomic clock. Kevin Birth, professor of anthropology at Queens College of the City University of New York, discusses how we measure time, and how that has changed over the course of the centuries.
• Is time travel possible? Will it ever be? Reporter Kathleen Davis checks into it. We hear from John Norton, a professor of the history and philosophy of science at the University of Pittsburgh.
• We explore the experience of déjà vu. We hear from Eva Hall who has déjà vu frequently, and Roderick Spears, a neurologist at the University of Pennsylvania.
• We take a look at a lesser-known book by Michael Ende, author of “The Neverending Story.” “Momo” tells the story of a young girl who fights back against an evil empire of time thieves. Journalist Giulia Pines tells us why she loves this book and what it has taught her about time.
• Claire Drexler, a grief therapist at the Center for Loss and Bereavement in Skippack, Pa., joins us to discuss how grief changes our experience of time. We also hear from Sol De Heras and Jared Michael Lowe, who talk about their personal experiences with grief and time.
• We also put together a playlist with songs about time, you can find it on Spotify.