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 ddd = today.getDate()-1;
 var dddd = today.getDate()-2;

 var mm = today.getMonth()+1; //January is 0!
 var yyyy = today.getFullYear();
 if(dd<10){
   dd='0'+dd
 } 
 if(mm<10){
   mm='0'+mm
 } 
 if(ddd<10){
   ddd='0'+ddd
 } 

 var today = dd+'/'+mm+'/'+yyyy;
 var d2 = ddd+'/'+mm+'/'+yyyy;
 var d3 = dddd+'/'+mm+'/'+yyyy;

With this i obtain the last 3 days of the current day but in this case today is 02 if i rest two days i obtain 0 but i want in this case the last day of the previous month, how can do this?

Here is my fiddle

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

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);

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

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 5

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 6

A convenient trick to get the end of last month is the take current date and use setDate(0) . Then use that that to create a new date object and setDate(1) for beginning of the month

 var prevMonthEnd = new Date(); prevMonthEnd.setDate(0); var beginLastMonth = new Date(prevMonthEnd); beginLastMonth.setDate(1); console.log([beginLastMonth.toString(), prevMonthEnd.toString()])

Answer 7

 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 8

I know many people have already answered it but I just figure out a 3 line solution so I thought I could share it in case anyone needs it.

 let date = new Date(); let firstDay = new Date(date.getFullYear(), date.getMonth() - 1, 2); let lastDay = new Date(date.getFullYear(), date.getMonth(), 1); console.log(firstDay.toISOString(), lastDay.toISOString())

This solution works dynamically even if the current month is January , this method will auto-detect the previous year.

Example:

If the current date is: 2022-01-12

Previous month's first day: 2021-12-01

Previous month's last day: 2021-12-31

**Additionally you can set the time of both dates to 00:00:00 by using setUTCHours like this:

 let date = new Date(); let firstDay = new Date(date.getFullYear(), date.getMonth() - 1, 2); firstDay.setUTCHours(0,0,0,0); let lastDay = new Date(date.getFullYear(), date.getMonth(), 1); lastDay.setUTCHours(0,0,0,0); console.log(firstDay.toISOString(), lastDay.toISOString())

Here's a working Fiddle example in case you need it.

Answer 9

var mydate = new Date(2020,2,1); // march 1st 2020 leap year
var lastdate = new Date(mydate.getFullYear(),mydate.getMonth(),0);// get last date of prev month
var firstdate = new Date(lastdate.getFullYear(), lastdate.getMonth(), 1);//get first date using last date

alert('' + firstdate.toDateString() + '');
alert('' + lastdate.toDateString() + '');