Given a month and the task is to determine the number of days of that month using JavaScript. We can get the number of days in a month by following ways:
JavaScript getDate() Method: This method returns the number of days in a month (from 1 to 31) for the defined date.
Syntax:
Date.getDate()
Return value: It returns a number, from 1 to 31, representing the day of the month.
JavaScript getFullYear() Method: This method returns the year (four digits for dates between year 1000 and 9999) of the defined date.
Syntax:
Date.getFullYear()
Return value: It returns a number, representing the year of the defined date
JavaScript getMonth() Method: This method returns the month (from 0 to 11) for the defined date, based on to local time.
Syntax:
Date.getMonth()
Return value: It returns a number, from 0 to 11, representing the month.
Example 1: This example gets the days in the month (February) of the year (2020) by passing the month (1-12) and year to the function daysInMonth.
Javascript
function daysInMonth(month, year) { return new Date(year, month, 0).getDate();}function GFG_Fun() { let date = new Date(); let month = 2; let year = 2020; console.log("Number of days in " + month + "and month of the year " + year + " is " + daysInMonth(month, year));}GFG_Fun() |
Number of days in 2and month of the year 2020 is 29
Example 2: This example gets the days in the current month of the current year by passing the month (1-12) and year to the function daysInMonth.
Javascript
function daysInMonth(month, year) { return new Date(year, month, 0).getDate();}function GFG_Fun() { let date = new Date(); let month = date.getMonth() + 1; let year = date.getFullYear(); console.log("Number of days in " + month + "th month of the year " + year + " is " + daysInMonth(month, year));}GFG_Fun() |
Number of days in 6th month of the year 2023 is 30
We have a complete list of Javascript Date Objects, to check those please go through this Javascript Date Object Complete reference article.
