Get the first and last date of the previous month in JQuery

Question

I have this script,

 var today = new Date();
 var dd = today.getDate();
 var ffffd = today.getDate()-1;
 var ffffdd = today.getDate()-2;

 var mm = today.getMonth()+         


        

Answer 1

That's the first day of the current month new Date(now.getFullYear(), now.getMonth(), 1) to get the last day of the previous month create a date 1-day earlier: new Date(now.getFullYear(), now.getMonth(), 1 - 1).

To get the first day of the previous month we should substract 1 from the month component new Date(now.getFullYear(), now.getMonth() - 1, 1) but there is an issue if the current month is January (0) and the previous month is December (11). Hence I wrapped the month expression creating a cycle so it always returns a positiove value.

var now = new Date();
var prevMonthLastDate = new Date(now.getFullYear(), now.getMonth(), 0);
var prevMonthFirstDate = new Date(now.getFullYear() - (now.getMonth() > 0 ? 0 : 1), (now.getMonth() - 1 + 12) % 12, 1);

var formatDateComponent = function(dateComponent) {
  return (dateComponent < 10 ? '0' : '') + dateComponent;
};

var formatDate = function(date) {
  return formatDateComponent(date.getMonth() + 1) + '/' + formatDateComponent(date.getDate()) + '/' + date.getFullYear();
};

document.write(formatDate(prevMonthFirstDate) + ' - ' + formatDate(prevMonthLastDate));

Answer 2

    var firstDay = new Date();
    var secondDay = new Date();
    var thirdDay = new Date();


  //Now say you want to set secondDay as before 2 days

    secondDay.setDate(secondDay.getDate()-2);

//Now say you want to set thirdDay as after 2 days  

        thirdDay.setDate(thirdDay.getDate()+2);
        alert("firstDay: "+firstDay+", secondDay:"+secondDay+", thirdDay:"+thirdDay);
        alert("date of thirdDay: dd/mm/yyyy  "+thirdDay.getDate()+"/"+ (thirdDay.getMonth()+1) +"/"+thirdDay.getFullYear()); 

Answer 3

You can do it like this

//one day previous  Date
var date = new Date();
date.setDate(date.getDate() - 1);
console.log(date.getDay());

//for previous month last date 
var date = new Date();
date.setDate(0);
console.log(date);

//for perivous Month First date
var date = new Date();
date.setDate(0);
date.setDate(1);
console.log(date);

Answer 4

What I have guessed is if current month is February then your output should be 1,31 because January's first day and last day is 1 and 31. So if that is the case then

var toDay = new Date();
var myDate = new Date(2016,toDay.getMonth()-1);
Fri Jan 01 2016 00:00:00 GMT+0530 (India Standard Time)

This will be assigned with the first day of the previous month.

Also, for the second case

var myDate = new Date(2016, toDay.getMonth());
myDate = new Date(myDate -1);
Sat Jan 31 2015 23:59:59 GMT+0530 (India Standard Time)

You can just use myDate to find whatever you want.

Answer 5

Try this: get today's date and set date to 1 which will get first of the current month. Then set hour to -1 which will shift it to previous months last day. Then set day to 1 to get first day of previous month.

var today = new Date();
var dd = today.getDate();

today.setDate(1); // going to 1st of the month
today.setHours(-1); // going to last hour before this date even started.
var lastDay = today.toLocaleDateString('en-GB', {  
                              year: 'numeric',
                              month: 'numeric',
                              day: 'numeric'
                          }).split(' ').join('-');

alert("last day of previous month " + lastDay);

today.setDate(1); // going to 1st of the previous month

var firstDay = today.toLocaleDateString('en-GB', {  
                              year: 'numeric',
                              month: 'numeric',
                              day: 'numeric'
                          }).split(' ').join('-');

alert("first day of previous month " + firstDay);

JSFiddle Demo

Answer 6

Try using bellow

var date = new Date();
var monthStartDay = new Date(date.getFullYear(), date.getMonth(), 1);
var monthEndDay = new Date(date.getFullYear(), date.getMonth() + 1, 0);