Or an infinite frictionless plane in a vacuum

Or a discworld, sitting on the back of four elephants who are standing on the back of a turtle.

What does the turtle stand on?

It floats in space. Let's not get crazy.

It's turtles all the way down.

The Turtle Moves

This is due mainly to our tilt, not our sphere-ness

On a spherical world with no tilt, what time is sunrise at the north pole?

Approximately four billion years ago.

Depends how tall you are.

Depends on the angle of the ecliptic

You're right, we need to straighten the earth up.