Difference between two dates in years, months, days in JavaScript

by

How precise do you need to be? If you do need to take into account common years and leap years, and the exact difference in days between months then you’ll have to write something more advanced but for a basic and rough calculation this should do the trick:

today = new Date()
past = new Date(2010,05,01) // remember this is equivalent to 06 01 2010
//dates in js are counted from 0, so 05 is june

function calcDate(date1,date2) {
    var diff = Math.floor(date1.getTime() - date2.getTime());
    var day = 1000 * 60 * 60 * 24;

    var days = Math.floor(diff/day);
    var months = Math.floor(days/31);
    var years = Math.floor(months/12);

    var message = date2.toDateString();
    message += " was "
    message += days + " days " 
    message += months + " months "
    message += years + " years ago \n"

    return message
    }


a = calcDate(today,past)
console.log(a) // returns Tue Jun 01 2010 was 1143 days 36 months 3 years ago

Keep in mind that this is imprecise, in order to calculate the date with full precision one would have to have a calendar and know if a year is a leap year or not, also the way I’m calculating the number of months is only approximate.

But you can improve it easily.

More Related Contents:

  1. Difference in Months between two dates in JavaScript
  2. new Date(2015,2,30) and new Date(‘2015-2-30’)
  3. How do I format a date in JavaScript?
  4. Calculate age given the birth date in the format YYYYMMDD
  5. How do I get the difference between two Dates in JavaScript?
  6. JavaScript seconds to time string with format hh:mm:ss
  7. Get the time difference between two datetimes
  8. Get String in YYYYMMDD format from JS date object?
  9. How to calculate the number of days between two dates? [duplicate]
  10. How to subtract date/time in JavaScript? [duplicate]
  11. Compare two dates with JavaScript
  12. Parsing a string to a date in JavaScript
  13. Get time of specific timezone [duplicate]
  14. Function to convert timestamp to human date in javascript [duplicate]
  15. How do I calculate how many seconds between two dates?
  16. javascript Date timezone issue
  17. Get the current year in JavaScript
  18. Javascript library for human-friendly relative date formatting [closed]
  19. Get week of the month
  20. Convert normal date to unix timestamp
  21. why does javascript getMonth count from 0 and getDate count from 1?
  22. Date difference in Javascript (ignoring time of day)
  23. Javascript equivalent of php’s strtotime()?
  24. Javascript countdown using absolute timezone?
  25. Why does Javascript getYear() return a three digit number?
  26. Date.toISOString() but local time instead of UTC
  27. Elegant method to generate array of random dates within two dates
  28. Javascript date parsing on Iphone
  29. create javascript date UTC
  30. toISOString() return wrong date

Leave a Comment