difference between two dates in days code example
Example 1: javascript difference between two dates
const date1 = new Date('7/13/2010');
const date2 = new Date('12/15/2010');
console.log(getDifferenceInDays(date1, date2));
console.log(getDifferenceInHours(date1, date2));
console.log(getDifferenceInMinutes(date1, date2));
console.log(getDifferenceInSeconds(date1, date2));
function getDifferenceInDays(date1, date2) {
const diffInMs = Math.abs(date2 - date1);
return diffInMs / (1000 * 60 * 60 * 24);
}
function getDifferenceInHours(date1, date2) {
const diffInMs = Math.abs(date2 - date1);
return diffInMs / (1000 * 60 * 60);
}
function getDifferenceInMinutes(date1, date2) {
const diffInMs = Math.abs(date2 - date1);
return diffInMs / (1000 * 60);
}
function getDifferenceInSeconds(date1, date2) {
const diffInMs = Math.abs(date2 - date1);
return diffInMs / 1000;
}
Example 2: calculate days between dates
let startDate = "2021-04-01";
let date1 = new Date();
let date2 = new Date(startDate);
let timeInMilisec = date1.getTime() - date2.getTime();
let daysBetweenDates = Math.ceil(timeInMilisec / (1000 * 60 * 60 * 24));
Example 3: how to calculate the number of days between two dates in javascript
function javascript (date1, date2) {
let oned = 24 * 60 * 60 * 1000;
return Math.ceil((date2 - date1) / oned);
}
function javascript(date1, date2) {
return new Date(date2 - date1).getDate() - 1
}
function javascript(date1, date2) {
return Math.ceil((date2 - date1) / 8.64e7);
}
Example 4: get days between two dates
// new Date("dateString") is browser-dependent and discouraged, so we'll write
// a simple parse function for U.S. date format (which does no error checking)
function parseDate(str) {
var mdy = str.split('/');
return new Date(mdy[2], mdy[0]-1, mdy[1]);
}
function datediff(first, second) {
// Take the difference between the dates and divide by milliseconds per day.
// Round to nearest whole number to deal with DST.
return Math.round((second-first)/(1000*60*60*24));
}
alert(datediff(parseDate(first.value), parseDate(second.value)));