QuestionsIf you are a professional pilot or your work involves professional aviation please use this forum for questions. Enthusiasts, please use the 'Spectators Balcony' forum.
Being "open" will not necessarily answer your question. Some countries, e.g. Germany, have night jet bans - typically 2300 - 0600 local time. They perhaps may accept diversions, and will accept landings in emergency, but the aircraft cannot depart again until after the end of the night period.