CalculationDate function:

CalculationDate.endOfPreviousMonth() returns a CalculationDate

Written by Roger Wallace
Updated over a week ago

Returns the last day in the month before that month that contains the CalculationDate.

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

var endOfMonth = date.endOfPreviousMonth();

console.log('endofLastMonth = %s', endOfMonth); 

//endOfLastMonth = 2017-02-28 00:00:00