June 21 is the first day of summer and is called the Summer Solstice. This is the longest day of the year, we get the most daylight on this day than any other day of the calendar year. The Sun reaches its most northern point in the sky at local noon. After today, the days start getting shorter. The word solstice is from the Latin solstitium, from sol (sun) and stitium (to stop), reflecting the fact that the Sun appears to stop at this time (and again at the winter solstice).