DD/MM/YY and YY/MM/DD are the only acceptable ones IMO. Throwing a DD in between YY and MM is just weird since days move by faster so they should be at one of the ends and since YY moves the slowest it should be on the other end.
That’s not how farming started though. They started farming so that they can feed themselves and their community. It eventually devolved into that, but it’s not how it started.