Earth rotates once in about 24 hours with respect to the Sun.

Early morning sun is as intense as mid- day  or late afternoon sun.

When the North Pole is tilted 23.5 degrees toward the Sun,  daytime will be longer.

Daytime and nighttime are always equal.

The axis of the earth is usually vertical and sometimes tilted.

As the Earth orbits the Sun, the orientation of the Earth stays unstable

The cold season is the result of the sun’s rays striking the ground  at a higher angle.