Jupitor$ bundle exec rake db:create db:migrate
APP_development already exists
rake aborted!
PG::Error: ERROR: invalid value for parameter \"TimeZone\": \"UTC\"
: SET ti
If nothing else fixes and you happen to be using homebrew, chances are you have issues with current links.
Assuming you have two Postgres versions installed, make sure you unlink and then link again. In my case, I needed the two versions working in order to run pg_upgrade. I have postgresql95 and postgresql so I did:
$ brew unlink postgresql
$ brew unlink postgresql95
$ brew link postgresql95
$ brew link --overwrite postgresql
That got me both working at same time. Hope it becomes helpful as it took me a good while to figure that out!