how-long-between
v1.0.4
Published
Calculates the years, months, days, hours, minutes, seconds and milliseconds between two dates
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how-long-between
Calculates the years, months, days, hours, minutes, seconds and milliseconds between two dates
Install
npm i --save how-long-between
Usage
import howLongBetween from 'how-long-between';
const today = new Date('Fri Apr 17 2020 12:54:09 GMT-0700 (Mountain Standard Time)');
const myBirthday = new Date('Wed May 6 2020 12:54:09 GMT-0700 (Mountain Standard Time)');
const {
milliseconds,
seconds,
minutes,
hours,
days,
months,
years,
} = howLongBetween(today, myBirthday);
Business Rules
One month from a date is the number of days in that month added to the date. So one month from January 31st would be March 2nd if that year was a leap year or March 3rd if that was not a leap year. Therefore, the amount of time between May 13st and Jun 30th is 30 days not one month.
Similiarly, one year from a date is the number of days in that year added to the date. So 1 year from February 29th would be March 1st of the following year.