Get last month javascript

Get Last Day of Month in JavaScript: Methods and Best Practices

Learn how to get the last day of the month in JavaScript with various methods and best practices. Handle leap years, time zone issues, and more. Read now!

JavaScript is a popular programming language for web development that provides many built-in functionalities, including handling dates and times. One common task is to get the last day of the month in JavaScript, which can be achieved using various methods. In this blog post, we will cover several ways to get the last day of the month in JavaScript, as well as some helpful tips and best practices.

Using the Date() constructor with set day parameter to 0

The simplest way to get the last day of the month in javascript is to use the Date() constructor and set the day parameter to 0. This method automatically handles leap years and returns the last day of the current month.

const date = new Date(); const lastDayOfMonth = new Date(date.getFullYear(), date.getMonth() + 1, 0); console.log(lastDayOfMonth.getDate()); 

Explanation: We create a new Date object and use the getFullYear() and getMonth() methods to get the current year and month. We then pass the year, the month + 1, and 0 for the day as parameters to the Date() constructor. The 0 day parameter indicates the last day of the previous month, which gives us the last day of the current month.

Using other methods with getMonth() and getFullYear()

Another way to get the last day of the month is by using the getMonth() and getFullYear() methods to get the current year and month, and then set the day parameter to 0.

const date = new Date(); const lastDayOfMonth = new Date(date.getFullYear(), date.getMonth() + 1, 0); console.log(lastDayOfMonth.getDate()); 

Explanation: The code is similar to the previous method, but we use the getMonth() and getFullYear() methods to get the current year and month instead of creating a new Date object.

Getting the first and last day of the current and previous months

In addition to getting the last day of the month, we can also get the first and last day of the current and previous months using JavaScript or jQuery.

const date = new Date(); const firstDayOfMonth = new Date(date.getFullYear(), date.getMonth(), 1); const lastDayOfMonth = new Date(date.getFullYear(), date.getMonth() + 1, 0); const firstDayOfPrevMonth = new Date(date.getFullYear(), date.getMonth() - 1, 1); const lastDayOfPrevMonth = new Date(date.getFullYear(), date.getMonth(), 0); 

Explanation: We create a new Date object for the current date and use the getFullYear() and getMonth() methods to get the current year and month. We then create new Date objects for the first and last day of the current and previous months by setting the day parameter to 1 for the first day and 0 for the last day.

Other ways to get month end date, number of days in a month, and first day of a month

There are several other methods to get the month end date, the number of days in a month , and the first day of a month in JavaScript.

const date = new Date(); const monthEndDate = new Date(date.getFullYear(), date.getMonth() + 1, 0); const numberOfDaysInMonth = monthEndDate.getDate(); const firstDayOfMonth = new Date(date.getFullYear(), date.getMonth(), 1); 

Explanation: We use the same Date() constructor method as before to get the month end date and the number of days in the month. We also use the day parameter set to 1 to get the first day of the month .

Validating if a date is the last day of the month

To validate if a date is the last day of the month, we can use the month inserted by the user + 1 with day = 0.

function isLastDayOfMonth(date)

Explanation: We create a function that takes a date as an argument and returns true if the date is the last day of the month. We use the getDate() method to get the day of the month and compare it to the last day of the month using the Date() constructor method with the day parameter set to 0.

Other code examples for getting the last day of the month in JavaScript

In Javascript as proof, javascript first and last day of the month code example

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

In Javascript , get last day of month javascript code sample

var today = new Date(); var lastDayOfMonth = new Date(today.getFullYear(), today.getMonth()+1, 0);

In Javascript , get the last day of the month in js code example

let today = new Date(); let lastDayOfMonth = new Date(today.getFullYear(), today.getMonth()+1, 0); let numberOfDays = lastDayOfMonth.getDate();

var today = new Date(); var lastDayOfMonth = new Date(today.getFullYear(), today.getMonth()+1, 0); 

In Javascript case in point, javascript first and last day of the month code example

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);

Conclusion

Getting the last day of the month in JavaScript can be achieved using various methods, including the Date() constructor and the getMonth() and getFullYear() methods. We can also get the first and last day of the current and previous months, as well as the month end date, the number of days in a month , and the first day of a month using JavaScript or jQuery. To validate if a date is the last day of the month, we can use the month inserted by the user + 1 with day = 0. It is important to use best practices and handle time zone issues when working with dates in JavaScript.

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How to get first and last date of the current month with JavaScript?

In this tutorial, we will look at how to get the first and last date of the current month using JavaScript.

In our daily lives, we frequently deal with dates, and we typically are aware of the day—or, at the very least, the month—we are in. To assist users in determining when something has occurred or will occur concerning their current situation, we display the name of a day or a month. This serves as a wonderful chronology.

Following are the approaches to get the first and last date of the month using JavaScript −

Using a Date Object

In this approach, we can make use of different methods to find out the first and last date of the month.

The getDate() method is used for the specified date, that returns the day of the month (from 1 to 31). This method returns the day of the month which is represented by a number between 1 and 31.

Then we use the getFullYear() method to return the year of the specified date (four digits for years between 1000 and 9999). It gives back a number that corresponds to the year of the specified date.

The getMonth() method, which is based on local time, returns the month (from 0 to 11) for the specified date. It gives back a number, ranging from 0 to 11, denoting the month.

Syntax

Following is the syntax to get first and last day of the current month −

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

Here, an object date is being created which will call the methods specified in the code. We again create a new date object firstDay to get the first day of the current month. For this, we pass the third parameter as 1. Choosing a day of 1 indicates gives us the first day of the month.

In the same way, we created the date object lastDay to get the last day of the current month. Choosing a day of 0 indicates gives us the last day of the month. When we add 1 to the getMonth() method’s return value, we will move one month forward. Then, by specifying 0 as the day, we move one day backward, to the last day of the month.

Example

In this example, we can see a date object is being created. The date object calls the methods getFullYear() and getMonth() to find out the first day of the current month.

html> body> h2>Get first and last date using i>Date Object/i>/h2> p id ="date1">/p> p id ="date2">/p> script> var date = new Date(); var firstDay = new Date(date.getFullYear(), date.getMonth(), 1); var lastDay = new Date(date.getFullYear(), date.getMonth() + 1, 0); document.getElementById("date1").innerHTML = "First day token operator">+ firstDay; document.getElementById("date2").innerHTML = "Last day token operator">+ lastDay; /script> /body> /html> 
 

Using the Moment.js Library

Moment.js is a JavaScript package. This can make it very simple to parse, manipulate, validate, and display dates and times in JavaScript. Moment.js will be introduced in this chapter, followed by a thorough discussion of its features. Moment JS enables the presentation of dates in a translated and legible manner. Moment.js has a scripted approach that allows you to use it inside a browser.

Syntax

Following is the syntax for the Moment.js date format −

const moment = require('moment'); const date = new Date('2022/01/01'); moment(date).format('MMMM d, YYYY'); // January 1, 2022

The moment library is included in the script ,and a date object is created. The date object is called and formatted according to the given format.

Example

In this example, we can see how the Moment.js library is included in the script. The firstdate variable calls the moment library and returns with the first date of the month in the specified format DD-MM-YYYY. Similarly, the lastdate variable will return the last day of the month in the specific format.

html> head> script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.26.0/moment.min.js"> /script> script src="https://cdnjs.cloudflare.com/ajax/libs/momenttimezone/0.5.31/moment-timezone-with-data-2012-2022.min.js">/script> /head> body> h2>Get first and last date using i>Moment JS/i>/h2> p id ="date1">/p> p id ="date2">/p> script> const firstdate = moment().startOf('month').format('DD-MM-YYYY'); const lastdate=moment().endOf('month').format("DD-MM-YYYY"); document.getElementById("date1").innerHTML = "First day token operator">+ firstdate; document.getElementById("date2").innerHTML = "Last day token operator">+ lastdate; /script> /body> /html> 
 

In this tutorial, what we have learned about is how to find the first and last date of the month using JavaScript. The first method discusses the prospective of using the date object with the getDate(), getMonth() and getFullYear() methods. The second method explores the idea of using an external library named MomentJS, which helps in formatting dates and finds the objective of this tutorial.

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Get first and last date of current month in JavaScript – Any given month also

This is a JavaScript tutorial where you can learn how to get first and last date of the current month in JavaScript. In many projects, we need to find out the first and last date. So I thought this tutorial gonna be helpful for us.
To get first and last date of current month in JavaScript we need these below methods:

In this tutorial, we will learn to find for both the current month and any given month

Get first and last date of current month in JavaScript

var my_date = new Date(); var first_date = new Date(my_date.getFullYear(), my_date.getMonth(), 1); document.write(first_date); var last_date = new Date(my_date.getFullYear(), my_date.getMonth() + 1, 0); document.write("
"+last_date);

Thu Nov 01 2018 00:00:00 GMT+0530 (India Standard Time) Fri Nov 30 2018 00:00:00 GMT+0530 (India Standard Time)

This is for the current date.

If you want to input the date manually you can insert the custom date in the: var my_date = new Date();

Date(); – here you can pass your custom date as a parameter.

Get first and last day of any given month

Now suppose that you want to get the first and last day of a particular given month. Let’s assume that we need to find the first day and the last day of January month of 2018.

var my_date = new Date("2018, Jan"); var first_date = new Date(my_date.getFullYear(), my_date.getMonth(), 1); document.write(first_date); var last_date = new Date(my_date.getFullYear(), my_date.getMonth() + 1, 0); document.write("
"+last_date);

Mon Jan 01 2018 00:00:00 GMT+0530 (India Standard Time) Wed Jan 31 2018 00:00:00 GMT+0530 (India Standard Time)

If you have any further doubts or questions put that in the below comment section.

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