I'd check whether that person indeed means 'this', or whether he is retarded and means next weekend.
If at 4PM on monday your boss tells you 'I need that report this monday!', do you postpone it a week, or do you presume he indeed means 'this', rather than 'next'?
Or if you find yourself surrounded by police with guns drawn, and they tell you 'This is your last warning, drop those bags!', do you await that next last warning? 😉