Daylight saving time - if only a horse could laugh

Salve,
 in US of A. almost all the states will change to so called Daylight Saving Time tonight (well,  this night - from Saturday to Sunday). Two exceptions - Arizona and distant Hawaii, wise people I should say, for
Good time will return in November. This simplemindedness will also be followed in Europe, a week later or so I think - my horse commentary on it:

Scientists say this time change is harmful to us, humans http://www.falw.vu.nl/en/Images/merrow%20d_tcm24-30739.pdf
 while so much drummed up energy savings are at best... nominal...

ps
God have mercy on the people of Japan, especially of the Northern Japanese Islands.