D-5 Countdown to Christmas

Create a function that calculates exactly how many milliseconds is the current Date away from Christmas Date ("Dec 25 2019"). You can subtract these days and you will get the difference in milliseconds. 

Then find a way to format this result to human readable like ('8 months, 27 days, 10 hours, 45 minutes and 35 seconds').

Extra bonus: Update this every second by calling this function within a setInterval.