On this most auspicious of days, we celebrate in Belgium's second most famous literary character by speaking like him for 24 hours.
It could be said that this is an attempt to reignite interest in one of Agatha Christie's most marvellous creations, but frankly it's just a print-pun on "Talk like a Pirate Day". Strong motivations indeed.
Generally, we follow the guidelines laid down by the television Poirot portrayed by David Suchet. Here are our house rules, but use your own if you think we've missed a trick.