JavaScript Date valueOf() Method Last Updated : 16 Jul, 2024 Comments Improve Suggest changes Like Article Like Report The date.valueOf() method is used to get the number of milliseconds between 1 January 1970 00:00:00 UTC and the given date. Syntax:dateObj.valueOf()Parameters: This method does not accept any parameter. It is just used along with a Date object created using Date() constructor. Return Values: It returns the number of milliseconds between 1 January 1970 00:00:00 UTC and the given date as the contents of the Date() constructor. Note: The DateObj is a valid Date object created using Date() constructor whose contents are used to get the number of milliseconds between 1 January 1970 00:00:00 UTC and the given date as the contents of the Date() constructor. Example 1: This example shows the use of JavaScript Date valueOf() Method. javascript // Here a date has been assigned // while creating Date object let dateobj = new Date('October 15, 1996 05:35:32'); // Getting the number of milliseconds between // 1 January 1970 00:00:00 // UTC and the given date as the content of // the above Date() constructor. let B = dateobj.valueOf(); // Printing the calculated number // of milliseconds. console.log(B); Output:845337932000Example 2: If nothing as a parameter is passed while creating a date object but still the valueOf() method returns the number of milliseconds between 1 January 1970 00:00:00 UTC and the current date. javascript // Here nothing has been assigned // while creating Date object let dateobj = new Date(); // Getting the number of milliseconds between // 1 January 1970 00:00:00 // UTC and the current date. let B = dateobj.valueOf(); // Printing the calculated number // of milliseconds. console.log(B); Output:1524387231290Example 3: Date of a month ranging between 1 to 31. If the date is taken as 35 which is out of the date range, it returns NaN i.e, not a number. javascript // Here a date has been assigned // while creating Date object let dateobj = new Date('October 35, 1996 05:35:32'); // Getting the number of milliseconds between // 1 January 1970 00:00:00 // UTC and the given date. let B = dateobj.valueOf(); // Printing the calculated number // of milliseconds. console.log(B); Output:NaNSome Important Points:Months, Dates, hours, minutes, seconds, and milliseconds should all be in their respective range. Otherwise valueOf() method returns NaN i.e, not a number.The range of Months, Dates, hours, minutes, seconds, and milliseconds are 0 to 11, 1 to 31, 0 to 23, 0 to 59, 0 to 59, and 0 to 999 respectively.We have a complete list of Javascript Date Objects, to check those please go through this Javascript Date Object Complete reference article.Supported Browsers: Google ChromeMozilla FirefoxOperaSafari Comment More infoAdvertise with us K Kanchan_Ray Follow Improve Article Tags : Misc JavaScript Web Technologies javascript-date JavaScript-Methods +1 More Practice Tags : Misc Similar Reads JavaScript Date() Constructor JavaScript Date constructor is used to create a new Date object. The value returned will be different on the basis of whether the object is called with or without the new keyword. If we call the object new keyword a Date object is created otherwise a string representing the current dat-time is retur 3 min read JavaScript Date constructor Property JavaScript Date constructor property returns the constructor function for an object. It is an ES1 feature and is supported by all browsers. The function which is returned by this property is just the reference to this function, not a date containing the functionâs name. The JavaScript date construct 2 min read JavaScript Date now() Method The Date.now() method in JavaScript returns the current timestamp in milliseconds since January 1, 1970. This method doesnât require creating a new date object, making it one of the fastest and most efficient ways to capture the current time in your code.Syntaxlet curr_date = Date.now();ParametersTh 2 min read JavaScript Date parse() Method The JavaScript Date parse() method parses a date string and returns the number of milliseconds between the date string and midnight of January 1, 1970, UTC. If the argument is an invalid date string, it returns NaN (Not a Number).Syntax:Date.parse(datestring);Parameters:This method accepts a single 3 min read JavaScript Date UTC() Method In JavaScript, the Date.UTC() method is used to create a date object representing a specified date and time in UTC (Coordinated Universal Time). It accepts the year, month, day, hour, minute, second, and millisecond components of the date and returns the number of milliseconds since January 1, 1970, 4 min read JavaScript Date getDate() Method The JavaScript getDate() method returns the day of the month (from 1 to 31) for a specified date according to local time. It's used with the Date object to extract and work with the day component of a date.Syntax:DateObj.getDate()Parameters:This method does not take any parameters.Return Value:Retur 4 min read JavaScript Date getDay() Method JavaScript Date getDay() Method is used to fetch the day of a week(0 to 6) from a given Date object.Syntax:DateObj.getDay()Parameters:This method does not accept any parameters.Return Values:It returns the day of the week for the given date. The day of the week will be returned in the form of an int 3 min read JavaScript Date getFullYear() Method The JavaScript Date getFullYear() Method is used to fetch the year from a given Date object.Syntax:DateObj.getFullYear()Parameters:This function does not accept any parameters.Return Values:It returns the year for the given date.Example 1: This example shows the use of Date getFullYear() Method.java 3 min read JavaScript Date getHours() Method The Javascript date.getHours() method is used to return the hours from a given Date object according to the local time (a value ranging from 0 to 23).Syntax:DateObject.getHours()Parameters:This method does not accept any parameter. Return values: It returns the Hours for the given Date object. Hours 3 min read JavaScript Date getMilliseconds() Method The date.getMilliseconds() method is used to fetch the milliseconds from a given Date object. Syntax: DateObj.getMilliseconds() Parameter: This function does not accept any parameter. Return values: It returns the millisecond for the given date object. Milliseconds is an integer value ranging from 0 3 min read Like