Javascript subtracting days from date

Question

This code where I subtract days from a date does not get the right results.

function get_Ash_Wednesday_date (year, Easter_month, Easter_day) {
    var Easter         


        

Answer 1

Saw a note in the references not to pass negative values to setDate().

Try this instead:

var Ash_Wednesday = new Date (  
    Easter_date.getFullYear(),  
    Easter_date.getMonth(),  
    (Easter_date.getDate()-46)  
)

This solution Finding date by subtracting X number of days from a particular date in Javascript doesn't seem to work any longer