The Sun is coming close to setting at the South pole now and the camera catches that event with greater clarity with each passing day with weather permitting -

https://www.usap.gov/videoclipsandmaps/spwebcam.cfm

The Equinox is an astronomical event where two different types of sunrises or sunsets occur within the same day and this event has happened as long as the Earth has been travelling around the Sun as are the distinct rotational causes for the dual sunrise/sunset events.

The insight predates the technological achievement which shows clearly how the planet responds to the daily and annual rotations to the Sun and especially with a focus on the Antarctic continent where daily rotation is complemented by the slow rotation of the continent across the sunlit face of the Earth and parallel to the orbital plane -

https://www.youtube.com/watch?v=CFrP6QfbC2g&t=45s

Why people would choose not to use their intelligence and imagination where it is necessary to subtract the Earth's daily rotation in order to appreciate the the entire surface of the planet turns once to the Sun across the period of a year is not for me to answer but it is and always will be there for those who make the effort to notice.