Talk:Sun Stones/@comment-99.68.231.159-20120613011726/@comment-174.100.105.244-20120613145522

The summer solstice occurs exactly when the axial tilt of a planet's semi-axis in a given hemisphere is most inclined towards the star that it orbits. Earth's maximum axial tilt to our star, the Sun, during a solstice is 23° 26'. This happens twice each year, at which times the Sun reaches its highest position in the sky as seen from the North or South Pole respectively

Though the summer solstice is an instant in time, the term is also colloquially used like Midsummer to refer to the day on which it occurs. Except in the polar regions (where daylight is continuous for many months), the day on which the summer solstice occurs is the day of the year with the longest period of daylight.