Placing the Sun…
Showing a sample — enter your own date, time and title and the night is drawn for that moment.
That moment
Where the Sun stood overhead:
The Sun’s position is computed from NASA JPL orbital elements; night and twilight are drawn for that minute.
Printed colours may differ slightly from what your screen shows. The Sun’s position is computed from NASA JPL orbital elements; coastlines are from Natural Earth and no borders are drawn.