JavaScript: Get the month start date

JavaScript Datetime: Exercise-52 with Solution

Month Start Date

Write a JavaScript function to get the month's start date.

Sample Solution:

JavaScript Code:

// Define a function called startOfMonth that takes a Date object 'date' as input
function startOfMonth(date)
{
    // Create a new Date object representing the start of the month by using the year and month of the input date and setting the day to 1
    return new Date(date.getFullYear(), date.getMonth(), 1);
}

// Create a new Date object representing the current date and time
dt = new Date(); 

// Output the start of the month for the current date and time, converted to a string
console.log(startOfMonth(dt).toString());

Output:

Fri Jun 01 2018 00:00:00 GMT+0530 (India Standard Time)

Explanation:

In the exercise above,

The code first defines a function called "startOfMonth()" which takes a "Date" object 'date' as input. This function creates a new "Date" object representing the start of the month of the given date. It achieves this by using the "getFullYear()" method to get the year of the input date, the "getMonth()" method to get the month of the input date, and setting the day to 1, effectively representing the first day of the month. Finally, it returns the newly created "Date" object.

The script then creates a new "Date" object called 'dt' representing the current date and time. It then calls the "startOfMonth()" function with 'dt' as an argument and outputs the result, which represents the start of the current month, converted to a string using the "toString(") method.

Flowchart:

Live Demo:

See the Pen JavaScript - Get the month start date-date-ex-52 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript function that returns the first day of the month for a given Date object.
• Write a JavaScript function that creates a new Date object representing the first day of the month from any valid date.
• Write a JavaScript function that formats the month start date as "MM/DD/YYYY" and handles single-digit months.
• Write a JavaScript function that validates the input date and returns the month start date even for edge cases like February.

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