Q. On which of the following dates, summer solstice is observed in Southern Hemisphere?
Answer: 21st December
Notes: The summer solstice occurs when a planet’s geographical pole on either its northern or Southern Hemisphere, is most inclined toward the star that it orbits. Depending on the shift of the calendar, the summer solstice occurs sometime between June 20 and June 22 in the Northern Hemisphere and between December 20 and December 23 each year in the Southern Hemisphere.