![]() However, very rarely do we have to care about these microscopic amounts of time. In addition, you can use the setMilliseconds() method and setMilliseconds() method if needed. In the code above, we have continuously mutated the original date object by adding days, hours, minutes, and seconds to it. The example below calculates a time in the future that is 5 days, 9 hours, 30 minutes, and 30 seconds away: // Get the current dateĬonsole.log('today: ', date.toLocaleString()) Ĭonsole.log('result: ', date.toLocaleString()) Log current date and expired date in friendly formatĬonsole.log("Current date: ", currentDate.toDateString()) Ĭonsole.log("Expired date: ", expiredDate.toDateString()) ġ5 * 24 * 60 * 60 * 1000 is exactly the number of milliseconds in 15 days.Įxpired date: Fri Using getDate(), setDate(), getHours(), setHours() Show a Custom Context Menu on Right ClickĬonst expiredDate = new Date(currentDate.getTime() + 15 * 24 * 60 * 60 * 1000) Browser Support setUTCDate () is an ECMAScript1 (ES1) feature. UTC time is the same as GMT time (Greenwich Mean Time). Notes UTC (Universal Time Coordinated) is the time set by the World Time Standard. Programmatically Disable/Enable a Text Input Definition and Usage The setUTCDate () method sets the day of a Date object, according to UTC. ![]() Get an array of dates between 2 given dates Syntax: Date.getHours () Parameters: This method does not accept any parameters. JavaScript getHours () Method: This method returns the hour (from 0 to 23) of the provided date and time. Sorting an Array of Objects by Date Property To add hours to date in javascript, we’re going to discuss a few techniques. Truncate the time portion of a date string ![]() Get current date time in yyyy/MM/dd HH:mm:ss formatĢ Ways to Convert a String into a Date ObjectĬonvert Timestamp to Date Time and Vice Versa Get the Key of an Object Property by Its ValueĬreate/Access Object Properties with Variable KeysĬhecking if a Key/Value Exists in an ObjectĬreate an Object from Arrays of Keys and ValuesĬonvert an Object to a Query String and Vice Versa Pass a JavaScript Array within a Query String Pass an Array to a Function as multiple Arguments Remove elements that occur in one array from another Remove all occurrences of a value from an arrayĬheck if an array contains a given objectĬonvert an Array to an Object in JavaScriptįind elements in array A but not in array B ![]() Update/Replace a Specific Element in an Array How to append/prepend/insert elements to an array Generate an array of random elements with a given length Using Arrow Functions in JavaScript ClassesĬount the occurrences of elements in an array Private, protected, and public class members Use JavaScript classes to model and validate data Generate a random number between Min and Max and exclude a specific numberĬalculate Variance and Standard Deviationĭefine a Function with Default Parameters Remove leading and trailing whitespace from a stringĬheck if a String Starts or Ends With a Substringĭifferent Ways to Generate Random StringsĬonvert a byte array to a hex string and vice versa JavaScript Regular Expressions Cheat SheetĬount the occurrences of each word in a string addHours = function ( hours ) const date = new Date ( 'T16:23:23.900Z' ) // Add 12 Hours const result = date. You can also add a method to the Date's prototype that adds the given number of hours to the current date: Date. The above methods also take care of the scenario where adding a specific number of hours to date results in the next day, month, or year: const date = new Date ( 'T16:23:23.900Z' ) // Add 10 hoursĭate. We multiplied the number of hours by 60 * 60 * 1000 to convert them to milliseconds before passing the value to the setTime() method. The setTime() method takes a number as input representing the milliseconds since January 1st, 1970, at 00:00:00 UTC and sets the value on the given date. The getTime() method returns the number of milliseconds elapsed between January 1st, 1970, at 00:00:00 UTC and the given date. log (today ) // Sat 11:24:04 GMT+0500 (Pakistan Standard Time) The following example demonstrates how you can add 4 hours to the current date in JavaScript: const today = new Date ( ) Call the setTime() method and pass it the number of milliseconds returned by getTime(), plus the hours you want to add in milliseconds.Use the getTime() method to get the number of milliseconds since Unix Epoch.
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