The word “solstice” brings together two Latin words: sol (sun) and sistere (to stand still). At the winter and summer solstices, the sun as seen from Earth appears to pause in its seasonal motion and then reverse its path.
In the northern hemisphere, our summer solstice occurs around June 21 each year. (In the southern hemisphere, this date marks the winter solstice. December 21 is their summer and our winter solstice.)