Dealing with Greek ATC System always called for some tolerance and flexibility.
But it also works the other way round.
Some year ago we were on our way to Paros island. Last Charter Flight of the year thus no pax on the leg to Greece enabled us to top up the tanks. Together with a strong tailwind it became clear in the air that we would make it into Paros without the usual en route fuel stop.
Problem: Paros would not be open yet at the new ETA. So we called Athens and asked them for help. Athens called Paros ATC an airport authorities at their homes and told us that it had been arranged to open the airport 3 h earlier.
Of course landing 3h before schedule left us waiting for pax. So ATC closed the airport again and joined us for a late brakfeast into Paros village