No they don’t. All the studies show that DST has no effect. The fact of the matter is when people are awake, regardless of what the clock says and where the sun is, they have the lights on. All the excuses for DST are lies, it’s stupid, accomplishes nothing. All it accomplishes is making you change your clock twice a year because the government said so.
If you’re sleeping when there’s daylight outside, you could probably be saving electricity. If the sun comes up at 5:00 AM, and you stay up until 11:00 PM but don’t get up until 7:00 AM, you could save two hours of electricity. After all, this means the sun sets at 7:00 PM, so your lights are on for four hours until you go to bed.
But with double daylight savings time, the sun would come up at 7:00 AM (same time you wake up), and wouldn’t go down till 9:00 PM. So your lights would only be on for two hours, not four.
Granted, the amount of electricity saved per household is small. But multiplying by every household, the savings are enormous.
And the studies on the topic are mixed.
You only have one clock to change, what 3d world nation do you live in?