Barbour kertoo youtube-videoissa, mitä aika on:

https://www.youtube.com/watch?v=K49rmobsPcY        0:08:19

https://www.youtube.com/watch?v=77pp1dVUEy0        1:03:29

https://www.youtube.com/watch?v=f29y1IzWwwI.       1:26:10