The longest day of the year

Don't believe the hype, today is the longest day of the year.

Popular opinion tells us that the longest day is some time in June, which may be the middle day of the year, and the one in which we get most sunlight (by a fraction of a second) but it's not 25 hours long is it?

Some days at work may seem longer but the clocks went back an hour at 2am this morning which means that today is undoubtedly the longest day of the year.

So there.