I believe this. I always feel horrible for at least 2 weeks after daylight savings, fall or spring. You get used to waking at the same time relative to the sun and now you all of a sudden have to shift everything to a different time to adjust. It's actually worse than jet lag because if you're travelling you will still end up on the same schedule relative to the sun. I genuinely believe the people who came up with this are either idiots or hate mankind.

P.S. Russia did away with it years ago and I'm honestly so jealous of that.