calculate difference between two dates in year javascript

javaScript Difference Between Two Dates in Years Months Days

In this javascript Tutorial, Calculate the difference between two dates in years, months, and days javascript. Here, we will explain how to calculate the difference between two dates and get the difference in years, months and days.

JavaScript Difference Between Two Dates in Years Months Days

• javascript difference between two dates in the year
• calculate the difference between two dates in month javascript
• javascript difference between two dates in days
• javascript difference between two dates in years months days

1. javascript difference between two dates in year

Here, we will create a javascript, which is used to calculate the difference between two dates in year.

Use the given below function, To calculate the difference between 2 dates and get the difference year.

Ex:-

Result Of the above code is: 1 Year

2. Calculate the difference between two dates in Month javascript

Here, we will create a javascript, which is used to calculate the difference between two dates in month.

Use the given below function, To calculate the difference between 2 dates and get difference month.

function monthDiff(dt1, dt2) < var diffMonth =(dt2.getTime() - dt1.getTime()) / 1000; diffMonth /= (60 * 60 * 24 * 7 * 4); return Math.abs(Math.round(diff)); >

Ex:-

Result Of the above code is: 5 Month

3. javascript difference between two dates in days

Here, we will create a javascript that is used to calculate the difference between two dates in days.

Use the given below function, To calculate the difference between 2 dates and get difference days.

Ex:-

Result Of the above code is: 2 days

4. javascript difference between two dates in years months days

javascript difference between two dates in years months days. Here we will create a new function, which is used to calculate the difference between two dates in years, months and days.

Using the below-given function, we will calculate the difference between two dates and get years, months and days between two dates:

function diff_year_month_day(dt1, dt2) < var time =(dt2.getTime() - dt1.getTime()) / 1000; var year = Math.abs(Math.round((time/(60 * 60 * 24))/365.25)); var month = Math.abs(Math.round(time/(60 * 60 * 24 * 7 * 4))); var days = Math.abs(Math.round(time/(3600 * 24))); return "Year :- " + year + " Month :- " + month + " Days :-" + days; >

Ex:-

Result of above code is: Year :- 1 Month :- 18 Days :-517

If you want to know more about javascript date and time methods, you may like following date and time methods:

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3. JavaScript Get Month Name With Various Examples
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My name is Devendra Dode. I am a full-stack developer, entrepreneur, and owner of Tutsmake.com. I like writing tutorials and tips that can help other developers. I share tutorials of PHP, Python, Javascript, JQuery, Laravel, Livewire, Codeigniter, Node JS, Express JS, Vue JS, Angular JS, React Js, MySQL, MongoDB, REST APIs, Windows, Xampp, Linux, Ubuntu, Amazon AWS, Composer, SEO, WordPress, SSL and Bootstrap from a starting stage. As well as demo example.

Источник

Math with dates javascript

Last updated: Jan 13, 2023
Reading time · 14 min

# Table of Contents

# Get the Number of Months between 2 Dates in JavaScript

To get the number of months between 2 dates:

1. Use the getMonth() method to calculate the month difference between the two dates.
2. Use the getFullYear() method to calculate the difference in years between the dates.
3. Multiply the year difference by 12 and return the sum.

Copied! 
function getMonthDifference(startDate, endDate)  return ( endDate.getMonth() - startDate.getMonth() + 12 * (endDate.getFullYear() - startDate.getFullYear()) ); > // 👇️ 2 console.log(getMonthDifference( new Date('2022-01-15'), new Date('2022-03-16')) ); // 👇️ 5 console.log(getMonthDifference( new Date('2022-01-15'), new Date('2022-06-16')) ); // 👇️ 14 console.log(getMonthDifference( new Date('2022-01-15'), new Date('2023-03-16')) ); 

We created a reusable function that returns the number of months difference between two dates.

The function takes the start and end Date objects as parameters.

The Date.getMonth method returns a zero-based value representing the month of the specific Date .

The method returns an integer between 0 and 11 , where January is 0 , February is 1 , etc.

This doesn’t matter for our purposes, but it’s good to know when working with dates in JavaScript.

We subtracted the month index of the start date from the month index of the end date. This gets us the number of months between the 2 dates (if the 2 dates are in the same year).

Copied! 
function getMonthDifference(startDate, endDate)  return ( endDate.getMonth() - startDate.getMonth() + 12 * (endDate.getFullYear() - startDate.getFullYear()) ); > 

The next step is to account for the possibility that the dates are in different years.

The Date.getFullYear method returns a 4-digit integer representing the year of the date.

We got the difference in years between the two dates and multiplied by 12 to get the difference in months.

The last step is to add the month difference (from the same year) to the result to get the total number of months between the two dates.

# Table of Contents

# Get the Number of Years between 2 Dates in JavaScript

To get the number of years between 2 dates, use the getFullYear() method to get the year of the date objects and subtract the start date from the end date.

The getFullYear method returns an integer that represents the year of the given date.

Copied! 
function getYearDiff(date1, date2)  return Math.abs(date2.getFullYear() - date1.getFullYear()); > // 👇️ 0 console.log(getYearDiff(new Date('2022-01-15'), new Date('2022-03-16'))); // 👇️ 3 console.log(getYearDiff(new Date('2022-01-15'), new Date('2025-06-16'))); // 👇️ 4 console.log(getYearDiff(new Date('2027-01-15'), new Date('2023-03-16'))); // ✅ (BIRTHDAYS) Get Year diff considering month function getYearDiffWithMonth(startDate, endDate)  const ms = endDate.getTime() - startDate.getTime(); const date = new Date(ms); return Math.abs(date.getUTCFullYear() - 1970); > // 👇️ 22 console.log( getYearDiffWithMonth(new Date('1999-09-24'), new Date('2022-01-17')), ); // 👇️ 7 console.log( getYearDiffWithMonth(new Date('2022-01-15'), new Date('2029-06-16')), ); 

We created a reusable function that takes 2 Date objects and returns the difference in years between them.

The Date.getFullYear method returns the year of the specified date.

In the first example, we subtract the year of one date from the year of the second date and pass the result to the Math.abs() function.

The Math.abs function is there to make sure that we always return a positive number.

Copied! 
console.log(Math.abs(-2)); // 👉️ 2 console.log(Math.abs(2)); // 👉️ 2 

Источник

Math with dates javascript

Last updated: Jan 13, 2023
Reading time · 14 min

# Table of Contents

# Get the Number of Months between 2 Dates in JavaScript

To get the number of months between 2 dates:

1. Use the getMonth() method to calculate the month difference between the two dates.
2. Use the getFullYear() method to calculate the difference in years between the dates.
3. Multiply the year difference by 12 and return the sum.

Copied! 
function getMonthDifference(startDate, endDate)  return ( endDate.getMonth() - startDate.getMonth() + 12 * (endDate.getFullYear() - startDate.getFullYear()) ); > // 👇️ 2 console.log(getMonthDifference( new Date('2022-01-15'), new Date('2022-03-16')) ); // 👇️ 5 console.log(getMonthDifference( new Date('2022-01-15'), new Date('2022-06-16')) ); // 👇️ 14 console.log(getMonthDifference( new Date('2022-01-15'), new Date('2023-03-16')) ); 

We created a reusable function that returns the number of months difference between two dates.

The function takes the start and end Date objects as parameters.

The Date.getMonth method returns a zero-based value representing the month of the specific Date .

The method returns an integer between 0 and 11 , where January is 0 , February is 1 , etc.

This doesn’t matter for our purposes, but it’s good to know when working with dates in JavaScript.

We subtracted the month index of the start date from the month index of the end date. This gets us the number of months between the 2 dates (if the 2 dates are in the same year).

Copied! 
function getMonthDifference(startDate, endDate)  return ( endDate.getMonth() - startDate.getMonth() + 12 * (endDate.getFullYear() - startDate.getFullYear()) ); > 

The next step is to account for the possibility that the dates are in different years.

The Date.getFullYear method returns a 4-digit integer representing the year of the date.

We got the difference in years between the two dates and multiplied by 12 to get the difference in months.

The last step is to add the month difference (from the same year) to the result to get the total number of months between the two dates.

# Table of Contents

# Get the Number of Years between 2 Dates in JavaScript

To get the number of years between 2 dates, use the getFullYear() method to get the year of the date objects and subtract the start date from the end date.

The getFullYear method returns an integer that represents the year of the given date.

Copied! 
function getYearDiff(date1, date2)  return Math.abs(date2.getFullYear() - date1.getFullYear()); > // 👇️ 0 console.log(getYearDiff(new Date('2022-01-15'), new Date('2022-03-16'))); // 👇️ 3 console.log(getYearDiff(new Date('2022-01-15'), new Date('2025-06-16'))); // 👇️ 4 console.log(getYearDiff(new Date('2027-01-15'), new Date('2023-03-16'))); // ✅ (BIRTHDAYS) Get Year diff considering month function getYearDiffWithMonth(startDate, endDate)  const ms = endDate.getTime() - startDate.getTime(); const date = new Date(ms); return Math.abs(date.getUTCFullYear() - 1970); > // 👇️ 22 console.log( getYearDiffWithMonth(new Date('1999-09-24'), new Date('2022-01-17')), ); // 👇️ 7 console.log( getYearDiffWithMonth(new Date('2022-01-15'), new Date('2029-06-16')), ); 

We created a reusable function that takes 2 Date objects and returns the difference in years between them.

The Date.getFullYear method returns the year of the specified date.

In the first example, we subtract the year of one date from the year of the second date and pass the result to the Math.abs() function.

The Math.abs function is there to make sure that we always return a positive number.

Copied! 
console.log(Math.abs(-2)); // 👉️ 2 console.log(Math.abs(2)); // 👉️ 2 

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