My dream world is we apply time zone logic to every other unit of measurement.
1 metre can be 100cm or 200cm depending on the season and your location
12 oz of alcohol would obviously be larger in the winter the closer you get to the poles. I think I like this idea.
My nightmare world would be one where we apply "everything else" logic to time.
1 kilosecond: about 17 minutes
1 megasecond: about 12 days
1 gigasecond: about 32 years
"Oh man, it's been a hot megasecond since we last spoke!" Said everyone, in my worst nightmares.