For my sins I help to organise an international photo exhibition each year. We have a closing date for entries, but as we receive entries from across the globe I have been hauled over the coals for operating the cut off clock at midnight UK time on the closing date. So that I can be fair to all, does anyone know the last country to reach midnight on the same date as the UK?
Tried that one but you'd be surprised how many people get p*ssy when we suggest that; quite a few people email to say that it might be midnight in UK but it isn't where they're living - hence the desire to try and get it right and fair for all.
If they are unable to work out what 2359GMT corresponds to in their time then I would be writing to them and suggesting that the mechanics of depressing a shutter button would be too far out of their range of brain power.