can any one help me to find first date and last date from month and year, i have 2 parameter month and year example month = 10 and year = 2021

i try some code but doesn't have the answer

 var prevMonthLastDay = new Date(2021, 10, 0);
    var thisMonthFirstDay = new Date(2021, 10, 1);
    console.log(prevMonthLastDay);
    console.log(thisMonthFirstDay);

but the answer in 2021-10-30T17:00:00.000Z 2021-10-31T17:00:00.000Z

my expected answer is first date 2021-10-01 and last date 2021-10-31

CodePudding user response：

You can try this way

var date = new Date();
var firstDay = new Date(date.getFullYear(), date.getMonth(), 1);
var lastDay = new Date(date.getFullYear(), date.getMonth()   1, 0);

CodePudding user response：

You can follow this.

//first and last of the current month
var current_month = "April 2017";
var arrMonth = current_month.split(" ");
var first_day = new Date(arrMonth[0]   " 1 "   arrMonth[1]);

//even though I already have the values, I'm using date functions to get year and month
//because month is zero-based
var last_day = new Date(first_day.getFullYear(), first_day.getMonth()   1, 0, 23, 59, 59);

//use moment,js to format       
var start = moment(first_day).format("YYYY-MM-DD");
var end = moment(last_day).format("YYYY-MM-DD");

the answer is in the following link: How to get last day of the month

CodePudding user response：

I'm a little bit confused with what you really want to get referencing your variable names, so I include them all:

const currentYear = 2021;
const currentMonth = 10;

const prevMonthFirstDay = new Date(currentYear, currentMonth - 2, 1);
const prevMonthLastDay = new Date(currentYear, currentMonth - 1, 0);

const currentMonthFirstDay = new Date(currentYear, currentMonth - 1, 1);
const currentMonthLastDay = new Date(currentYear, currentMonth, 0);

const nextMonthFirstDay = new Date(currentYear, currentMonth, 1);
const nextMonthLastDay = new Date(currentYear, currentMonth   1, 0);

console.log('prev month first day:', prevMonthFirstDay);
console.log('prev month last day:', prevMonthLastDay);
console.log('current month first day:', currentMonthFirstDay);
console.log('current month last day:', currentMonthLastDay);
console.log('next month first day:', nextMonthFirstDay);
console.log('next month last day:', nextMonthLastDay);

on my system this will gives:

prev month first day: Wed Sep 01 2021 00:00:00 GMT 0700 (Western Indonesia Time)
prev month last day: Thu Sep 30 2021 00:00:00 GMT 0700 (Western Indonesia Time)
current month first day: Fri Oct 01 2021 00:00:00 GMT 0700 (Western Indonesia Time)
current month last day: Sun Oct 31 2021 00:00:00 GMT 0700 (Western Indonesia Time)
next month first day: Mon Nov 01 2021 00:00:00 GMT 0700 (Western Indonesia Time)
next month last day: Tue Nov 30 2021 00:00:00 GMT 0700 (Western Indonesia Time)

so now it will only a matter of formatting:

console.log(currentMonthFirstDay.toLocaleDateString('en-GB').split('/').reverse().join('-'));

which will give you:

2021-10-01

CodePudding user response：

Try the following to get your expected output:

function GetFirstAndLastDate(year, month)
{
var firstDayOfMonth = new Date(year, month-1, 2);
var lastDayOfMonth = new Date(year, month, 1);

console.log('First Day: '   firstDayOfMonth.toISOString().substring(0, 10));
console.log('Last Day: '   lastDayOfMonth.toISOString().substring(0, 10));

}

GetFirstAndLastDate(2021, 10);

<iframe name="sif1" sandbox="allow-forms allow-modals allow-scripts" frameborder="0"></iframe>

CodePudding user response：

You can try this way referrence

var date = new Date(), y = date.getFullYear(), m = date.getMonth();
var firstDay = new Date(y, m, 1);
var lastDay = new Date(y, m   1, 0);