They mean 1 hour earlier relative to the sun cycle, and they are correct. Because the sun strongly influences our circadian rhythm, this is the correct frame of

They mean 1 hour earlier relative to the sun cycle, and they are correct. Because the sun strongly influences our circadian rhythm, this is the correct frame of reference, from a health standpoint, not wall time. If you get up at 8 every day, you're getting up ~2 hours after dawn (depending on date/location). When DST hits, 7 becomes 8, and you're getting up ~1 hour after dawn.