@Marvin what has this changed to in 3.0 ->

from prefect.server.utilities.schemas import DateTimeTZ

In Prefect 3.0, the

DateTimeTZ

class you were using has undergone a bit of a transformation. It is now essentially an alias for

DateTime

, with the appropriate

pydantic

validator functions added dynamically. This change was made to reduce typing errors and create a more seamless transition, especially when you feel like you're downcasting a

DateTime

to a

DateTimeTZ

. Here's a source of this change. Additionally, it seems they have also duplicated schemas client-side to enhance import times and separate client/server logic more effectively. This requires changes to the development workflow, as model changes need to be made in two places now. As you dive into this new version, you'll find these optimizations aim to improve performance, so brace yourself for a speedier Prefect, without any unnecessary paranoia—unless that's your thing.