At the moment, the timezone of the contact is directly linked to the ip address of the person who uploaded the csv or the timezone of the account. Please can you separate them. Otherwise if you have contacts in different timezones they all get set to the same timezone. Automations get sent out in the middle of the night instead of first thing in the morning. Perhaps link the timezone to the address, postcode, country or state (for the US) . The current situation is atrocious.