@noctarius2k @michal . Anyway my problems with DateTime (local vs UTC) vs #postrgress was firtsly because of changes in Npgsql and how they changed mappings, secondly DateTime in .NET correcly parsed non existing time from string which I did not realize at testing. (other function in .NET for converting datetime to UTC throwed exception) then it "started" work correctly. I was near to use #NodaTime and I will in next project 😄 . Postrgres timestamptz is confusing type 😄