Day & night map preview
Placing the Sun…

The Sun’s position is computed from NASA JPL orbital elements; night and twilight are drawn for that minute.

Day and Night at Your Moment — which half of the world was lit

P By Punto

Which moment?

The night is computed for that minute: an hour moves the dark 15° round the world. That is why the time is needed too.

A birth, a wedding, a New Year, a first step — any day from 1800 to 2050. The chosen place’s clock; with no place, Türkiye’s. The poster prints the UTC offset beside the time.