Sunday June 27 will be the day that seems longest. That is, sunset will be latest (for latitude 40° north).
Why does latest sunset not coincide with the June 21 solstice, and why does it vary with your latitude on Earth? This slightly subtle subject is rather fully explained here: “Latest and earliest sunrise and sunset.” The diagram in the page sums it 
Nearer in time and space
Saturday June 26 is International Day in Support of Victims of Torture.
This bitter topic is given renewed urgency by yesterday’s news from Syria. There is a was of a wave of government shelling of Idlib province, the small area by the Turkish border where dissidents – Islamist or pro-democracy – huddle. Five thousand civilians have been newly forced to flee, and at least 31 killed, including some more of the civil defense volunteers who try to rescue victims in bombarded schools, displacement camps, and hospitals. If Assad’s ground forces advance into Idlib, more of his captured opponents will disappear into the torture cells of his dungeons, where 13,000 have been hanged.
Here is a specific action you can take on Syria. You needn’t read it all, you can scroll down to the large words “SEND AN EMAIL,” fill in your name and country, change the supplied text if you wish (I usually shorten it), and click “SEND.”
The point is to press the international community to use pressure on Syria. Pressure consists of individual mites of pressure.
This is part of the global action that Amnesty International takes on the International Day in Support of Victims of Torture.
__________
ILLUSTRATIONS in these posts are made with precision but have to be inserted in another format. You may be able to enlarge them on your monitor. One way: right-click, and choose “View image”, then enlarge. Or choose “Copy image”, then put it on your desktop, then open it. On an iPad or phone, use the finger gesture that enlarges (spreading with two fingers, or tapping and dragging with three fingers). Other methods have been suggested, such as dragging the image to the desktop and opening it in other ways.
Sometimes I make improvements or corrections to a post after publishing it. If you click on the title, rather than on ‘Read more’, I think you are sure to see the latest version.
This weblog maintains its right to be about astronomy or anything under the sun.
I’m still confused about why earliest sunrise and latest sunset do not coincide with day of summer solstice.
I did glean from “The Latest Sunset and Earliest Sunrise” page that earliest sunrise and latest sunset do not coincide with the solstice because of the use of mean solar time instead of actual solar time.
I am still unclear however as to how the use of mean solar time would displace sunrise and sunset times away from the solstice. if mean solar time is, for example, 1 minute earlier than actual solar time, wouldn’t it be 1 minute earlier at both sunset and sunrise?
Yes. So this would change the date on which mean sunset is latest.