Who needs regex. ;-) Actually there's no need to apply a "fix" when you figure out how many components the result will consist of before building it and use " and " to separate the two final components regardless of what they are (days, hours, ...).

Try a regex that targets that last ',' and replace it in the formatted string or use lastIndexOf(',') to the same effect.

Fixed.

How did you guys fix the "and" for the last word? I basically coded everything except that part so my code gives 1 day, 4 hours, 20 minutes instead of 1 day, 4 hours and 20 minutes. So my code only adds and if there are seconds