13 links have been added on 6 ideas about #clock.
  1. The round design of clocks (and the clockwise movement) was adopted from the sundials, which were used to tell time in ancient eras.
    https://www.farmersalmanac.com/sundials-time-began-18870

  2. easy to do on an iphone – see this link

  3. Alarms are typically set to specific times, but it’s possible to create alerts based on the dynamic sunrise and sunset times in your area. This can be done with a Google Assistant routine on Android.

  4. How come there isn’t already an alarm app that knows that you are already awake – due to the phone moving that morning? A few people have been after this for a while.