// Takes two strings as input, format is dd/mm/yyyy

// returns true if d1 is smaller than or equal to d2

​

function compareDates(d1, d2){

var parts =d1.split('/');

var d1 = Number(parts[2] + parts[1] + parts[0]);

parts = d2.split('/');

var d2 = Number(parts[2] + parts[1] + parts[0]);

return d1 <= d2;

}

var date1 = new Date('December 25, 2017 01:30:00');

var date2 = new Date('June 18, 2016 02:30:00');

​

//best to use .getTime() to compare dates

if(date1.getTime() === date2.getTime()){

    //same date

}

​

if(date1.getTime() > date2.getTime()){

    //date 1 is newer

}

const compareDates = (d1, d2) => {

  let date1 = new Date(d1).getTime();

  let date2 = new Date(d2).getTime();

​

  if (date1 < date2) {

    console.log(`${d1} is less than ${d2}`);

  } else if (date1 > date2) {

    console.log(`${d1} is greater than ${d2}`);

  } else {

    console.log(`Both dates are equal`);

  }

};

​

compareDates("06/21/2022", "07/28/2021");

compareDates("01/01/2001", "01/01/2001");

compareDates("11/01/2021", "02/01/2022");

​

// This will return:

​

// "06/21/2022 is greater than 07/28/2021"

// "Both dates are equal"

// "11/01/2021 is less than 02/01/2022"

var d1 = Date.parse("2012-11-01");

var d2 = Date.parse("2012-11-04");

if (d1 < d2) {

    alert ("Error!");

}

// We initialize the Date() object with the current date and time

const date1 = new Date();

// We initialize a past date

const date2 = new Date('2018-04-07 12:30:00');

​

// Let's see if the first date is equal, more recent or less recent than the second date

if (date1.getTime() === date2.getTime()) {

    console.log('The dates are equal');

}

else if (date1.getTime() > date2.getTime()) {

    console.log(date1.toString() + ' is more recent than ' + date2.toString());

}

else {

    console.log(date1.toString() + ' is less recent than ' + date2.toString());

}

let date1 = new Date("2024-01-29T03:34:48.000Z"); // Tue Jan 29 2024 03:34:48 GMT+0000

let date2 = new Date("2024-01-29T15:00:00.000Z"); // Tue Jan 29 2024 15:00:00 GMT+0000

let date1String = date1.toDateString();           // "Tue Jan 29 2024"

let date2String = date2.toDateString();           // "Tue Jan 29 2024"

​

console.log(date1String === date2String); // Output: true

console.log(date1String < date2String);   // Output: false

console.log(date1String > date2String);   // Output: false

​

var isLarger = new Date("2-11-2012 13:40:00") > new Date("01-11-2012 10:40:00");

​

var x = new Date('2013-05-23');

var y = new Date('2013-05-23');

​

// less than, greater than is fine:

x < y; => false

x > y; => false

x === y; => false, oops!

​

// anything involving '=' should use the '+' prefix

// it will then compare the dates' millisecond values

+x <= +y;  => true

+x >= +y;  => true

+x === +y; => true

​

const d1 = new Date("Mon Jan 3 2022 16:38:58 GMT+0530 (India Standard Time)") 

const d2 = new Date("2022-01-03T18:30:00Z")

console.log(d1)

console.log(d2)

​

if (d1 < d2) console.log("Date 1 is earlier than d2")

​

// To find hh:mm:ss difference for the same day we can do this. 

console.log(new Date(d2-d1).toISOString().substr(11, 8))

// solution is convert date to time by getTime()

start       = startDate.getTime();

end         = endDate.getTime();

current     = date.getTime();

​

if (start <= current && current <= end) {

  // do something here

}

let myDate = new Date("January 13, 2021 12:00:00");

let yourDate = new Date("January 13, 2021 15:00:00");

​

if (myDate < yourDate) {

  console.log("myDate is less than yourDate"); // will be printed

}

if (myDate > yourDate) {

  console.log("myDate is greater than yourDate");

}