When the aliens land they are NOT going to consider us intelligent lifeforms. Because intelligent lifeforms would not ever have come up with the utter nonsense known as daylight savings time. Intelligent lifeforms would say, "If you want more daylight during your waking hours then get up earlier in the morning."
P.S. I've never bought the excuse of this originating with wartime factories saving energy ... I mean, I know that's the reasoning behind it but honestly, since there's the same number of hours of daylight per day no matter what time the clocks say it is, nobody ever thought just to change the operating hours?
You'd never guess I really REALLY hate the idiocy known as clock changes, would you?