On Sun, 2 Dec 2018 18:00:00 -0800 (PST), Quadibloc
wrote:

Earth's day is 24 hours. Period. Full stop.

Correct. The solar day is 24 solar hours, and the sidereal day is 24
sidereal hours.

Simple, isn't it? All you have to think about is to match your
selected type of day to the appropriate type of hour.