Date duration / date subtraction calculations

Question

The requirement is to calculate the result of subtracting a certain number of days from a given date.

For example, if the given date is "3-Nov-2015 "and if the duration is 5 days, the result should be "29-Oct-2015".

What is the best way to do this?

Can't you use the answer provided here? http://stackoverflow.com/questions/1296358/subtract-days-from-a-date-in-javascript Did you search for an answer before posting? — Marc, Nov 17 '15 at 18:09

score 0 · Accepted Answer · answered Nov 17 '15 at 18:17

Using the momentjs library:

moment("3-Nov-2015", "DD-MMM-YYYY").subtract(5, 'days').format("DD-MMM-YYYY");

Or, more modularly:

function getPrevDate(startDate, numDays, dateFormat) {
  var dateFormat = dateFormat || "DD-MMM-YYYY"; // default date format
  return moment(startDate, dateFormat).subtract(numDays, 'days').format(dateFormat);
}

getPrevDate("3-Nov-2015", 5) returns "29-Oct-2015"

Date duration / date subtraction calculations

1 Answers1