Returns a new CalculationDate relative to the CalculationDate on the same day of the week for the week following the one that contains the CalculationDate. 

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

var nextWeek = date.nextWeek();

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

//nextWeek = 2017-02-22 00:00:00
Did this answer your question?