My personal trying moment was a flight on a nice summer’s evening to a Greek island. Just before top of descent I was told that the airport was closed. Enquiring about the alternate I was told that was also closed. It transpired that virtually every Greek airfield had closed due to an IT failure at the handling agent that meant that aircraft could not depart and thus each airfield was full. Thankfully I managed to divert to an airfield that was the only one that was not part of this group. The problem had been going on for most of the day but a notam had not been issued and the email to my operator had not been read. I only wish that I had loaded enough fuel to get back to Athens but the forecasts did not justify carrying it. I never made that error again.