My question about timezones was asked previously in the forum but apparently not answered: How do I change the timezone associated with a batch of observations?
When the new settings dialog was announced, I changed my default timezone to the correct timezone. Prior to that, I didn’t realize I had control over the default timezone. Consequently, I have 1000s of observations with an observed date having an incorrect timezone.
It turns out the incorrect timezone I had been using all along is offset from the correct timezone by one, that is, the observed dates are off by one hour. Maybe that’s not a big deal, I don’t know.