When filtering for shift occurrences by date range, it was possible to display
shifts from outside that date range. That's because we were converting the
passed in date to a datetime, and rails was using UTC for that time. So
something at 6pm US Mountain Time would actually be 1am the "next day" in UTC.
To fix this, I stopped trying to treat the passed in dates at times and just
treated them like dates. When we need times, like when filtering shift
occurrences, we convert to a time in the current Time.zone.
When filtering for shift occurrences by date range, it was possible to display
shifts from outside that date range. That's because we were converting the
passed in date to a datetime, and rails was using UTC for that time. So
something at 6pm US Mountain Time would actually be 1am the "next day" in UTC.
To fix this, I stopped trying to treat the passed in dates at times and just
treated them like dates. When we need times, like when filtering shift
occurrences, we convert to a time _in the current Time.zone_.