It is neutral on the exact second of the solstice. Straight up and down vertical. However, after the smallest amount of time, there is a tiny tilt.
Thr tilt of the Earth's axis .
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The Earth's tilt is what causes the seasons.
Earth's axial tilt is 23.44°.
23.5 degrees
The revolution of the Earth around the sun causes the changing seasons and the positions of the solstices and equinoxes. The solstices occur when the Earth's axis is tilted most toward or away from the sun, leading to the longest and shortest days of the year. The equinoxes occur when the tilt is at a right angle to the sun, resulting in day and night being of nearly equal length.
The earths tilt at its axis
Seasons
mostly climate
23.5 degrees
Earth's tilt is much older than that - it probably had its tilt for millions of years.
23.5 degrees