What do you notice about the line separating day from night? Does it looks like sunrise occurs at the same time or different times along your longitude line? On the equinoxes (spring and fall), sunrise and sunset occur at the same time everywhere along a longitude line. These are the only times of year when this happens. Can you explain why?

March: 24 hours on the Spring Equinox
The Living Earth® image is a composite of Earth satellite imagery developed by The Living Earth, Inc.
From: The Earth and Moon Viewer