A day on Earth lasts 50 hours

Officially speaking a day on Earth lasts 50 hours when you take into consideration of time zones. The catch is that for a single time zone it only lasts 24 hours. And that there is an overlap of time zones. In fact for a short two hours each day on Earth it is simultaneously today, tomorrow, and yesterday. The nation of Kiribati stretches the range of time zones an extra 2 hours - giving the Earth a total range of 26 hours. Time is a relative thing of course. What this means is that somewhere on earth chances are your birthday has a little wiggle room.