How do you answer Facebook's hiring question about your very best day at work?

‘On your very best day at work – the day you come home and think you have the best job in the world – what did you do that day?’ social network asks prospective employeesTechnology companies are notorious for favouring impossible job interviews. Google’s questions range from logic puzzles (“how would you weigh an elephant without using a scale”?) to puzzles of a different sort altogether: it asks would-be music curators to put together a playlist that wo