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  3. Check If a Date Is Today in JavaScript or Node.js

Check If a Date Is Today in JavaScript or Node.js

Modern applications show lots of useful information right in the user interface. For example, you as a user want to see if something is due today and be notified about the event.

As a developer you need to make sure you’re showing the right items for today. That’s where this tutorial helps you out by walking you through a way to check whether a given date is “today”.

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Determine If a Date Is Today in JavaScript

Determining if a date is today means that the compared date has the same year, month, and day as the current day. You can implement that in JavaScript using the built-in date functions.

JavaScript’s Date provides methods to retrieve the year, month, and day in a month.

Use the Date#getDate method to retrieve the day in a month. Intentionally you may looked for a getDay method. But the getDay function returns the day of the week instead of the day of the month.

Also, you should use the getFullYear method to retrieve the current year instead of the getYear method, because getYear returns the years since 1900 and not the full year number. You may want to look at this tutorial on retrieving the year number in JavaScript.

Here’s a sample function allowing you to detect whether a given date is today:

/**
 * Determine whether the given `date` is today.
 *
 * @param {Date} date
 *
 * @returns {Boolean}
 */
function isToday (date) {  
  const now = new Date()

    return date.getDate() === now.getDate() &&
         date.getMonth() === now.getMonth() &&
         date.getFullYear() === now.getFullYear()
}

Now you can use the isToday function from above like this:

isToday(new Date())  
// true

isToday(new Date('2022-10-31'))  
// false

Enjoy checking dates for today!

Mentioned Resources

Marcus Pöhls

Marcus is a fullstack JS developer. He’s passionate about the hapi framework for Node.js and loves to build web apps and APIs. Creator of Futureflix and the “learn hapi” learning path.

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