The system should be converting from UTC as stored in the database for display and other actions. If you find areas where this is not happening, please open a bug report.
In terms of utilizing data from the database in another application, you will need to adjust the date times from UTC to your desired timezone.
When we last tested it, there were issues with rendering background images among other things that we could not resolve. If you give it a try, and everything works, let us know!
create a plugin that will use the event Emails.send
then check if the email sent is "Invoice Notice (3rd)" . then create a ticket with the info you want to add it behalf to the client "to_client_id"