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One interesting consequence of this is that the further west that you look within a timezone, the less sleep people tend to get.

> Examination of ATUS activity logs shows that workers experiencing earlier sunset also go to bed earlier and that this correlation between sunset and bedtime persists even if the worker goes to bed well after dark. Coordinated work start times translate this earlier bedtime into longer sleep.

Time Use and Productivity: The Wage Returns to Sleep, Matthew Gibson and Jeffrey Shrader

Yeah, they do have a meaning in terms of coordinating when we do things with other people. Which seems to be a better reason NOT to mess with it at all, really...

There's no DST where I live. That's a good thing. Now I only have to worry about people who didn't resend Outlook invites after the time change or such.

They have that meaning because we are used to it. We'd adapt when a get used to the new situation.