Returns a DateRange that starts at the CalculationDate and continues to the specified date. 

var date = now.valueOf('2017-03-15'); 

var nextMonth = date.nextMonth();

var range = date.until(nextMonth);

console.log('range = %s', range);

//range = 2017-03-15 00:00:00 -> 2017-04-15 00:00:00
Did this answer your question?