Solstice

So today is the Summer solstice, the longest day of the year. From now on, we will be
adding a few seconds of nighttime everyday, at an accelerating pace of up to a few minutes
at the fall equinox, and slowing down again to the winter solstice. For Montreal, sun up
at 5:06 and sundown at 20:43, for a 15:36 hour day.

http://www.lefigaro.fr/sciences/2018/06/20/01008-20180620ARTFIG00277-nous-serons-officiellement-en-ete-a-12h07-ce-jeudi-21-juin.php