How to store all dates in an array present in between given two dates in JavaScript ?

Namachila 12 hours ago

0 0 2 minutes read

Given two dates and the task is to get the array of dates between the two given dates using JavaScript.

Below are the following approaches:

Using push() Method
Using for loop and push() Method

Approach 1: Using push() Method

Select the first and last date and store it in a variable.
Check if the start date is less than the stop date then push the current date in an array and increment its value by 1 day.
Repeat the above step until currentDate equal to the last date.

Example: In this example, the array of dates is determined by the above approach.

Javascript

Date.prototype.addDay = function (days) {
    let date = new Date(this.valueOf());
    date.setDate(date.getDate() + days);
    return date;
}
 
function getDate(strDate, stpDate) {
    let dArray = new Array();
    let cDate = strDate;
    while (cDate <= stpDate) {
 
        // Adding the date to array
        dArray.push(new Date(cDate) + '<br>');
 
        // Increment the date by 1 day
        cDate = cDate.addDay(1);
    }
    return dArray;
}
 
function GFG_Fun() {
    let startDate = new Date();
 
    // Making lastDate equal to 4 more days
    // from startDate.
    let endDate = startDate.addDay(4);
    console.log(getDate(startDate, endDate));
}
GFG_Fun();

Output

[
  'Tue Jul 18 2023 18:59:06 GMT+0000 (Coordinated Universal Time)<br>',
  'Wed Jul 19 2023 18:59:06 GMT+0000 (Coordinated Universal Time)<br>',
  'Thu Jul 20 2023 18:59:06 GMT+0000 (Coordinated Univ...

Approach 2: Using for loop and push() Method

Get the first and last date and store it into a variable.
Calculate 1 day equivalent in milliseconds called _1Day.
Set a variable equal to the start date, called ms
Push ms (milli-seconds) in form of a date in an array and increment its value by _1Day.
Repeat the above step until ms is equal to the last date.

Example: In this example, the array of dates is determined by the above approach.

Javascript

Date.prototype.addDay = function (days) {
    let date = new Date(this.valueOf());
    date.setDate(date.getDate() + days);
    return date;
};
 
function getDates(date1, date2) {
    let _1Day = 24 * 3600 * 1000;
 
    // Date[] keeps all the dates
    let dates = [];
 
    for (let ms = date1.getTime(), last = date2.getTime();
        ms <= last; ms += _1Day) {
        dates.push(new Date(ms));
    }
 
    return dates;
}
 
function GFG_Fun() {
    let startDate = new Date();
 
    // Making lastDate equal to 4 more days
    // from startDate
    let endDate = startDate.addDay(4);
    console.log(getDates(startDate, endDate));
}
 
GFG_Fun();

Output

[
  2023-07-18T19:12:03.831Z,
  2023-07-19T19:12:03.831Z,
  2023-07-20T19:12:03.831Z,
  2023-07-21T19:12:03.831Z,
  2023-07-22T19:12:03.831Z
]

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