The aircraft was originally supposed to arrive back last night after it's initial delay. It has now gone from 17:20 today to 00:45 tomorrow.
I understand that if the aircraft had to divert due to bad weather then maybe the crew would require minimum rest etc, but this flight is well over 24 hours delayed and the delay is keep getting strecthed.
There could be several reasons for the extended delay including Technical reasons or possibly Greek ATC playing a part.