javascript convert date excel code example

Example 1: excel date to javascript date

// function to convert excel date to normal js date  
excelDateToJSDate(excelDate) {
    var date = new Date(Math.round((excelDate - (25567 + 1)) * 86400 * 1000));
    var converted_date = date.toISOString().split('T')[0];
    return converted_date;
}

Example 2: excel date to javascript date

/use excel-date-to-js

//Description
//Converts Excel date in integer format into JS date.
//Dates are stored as numbers in Excel
//and count the number of days since January 0, 1900 (1900 standard, for mac it is 1904, which means January 0, 1904 is the start date).
//Times are handled internally as numbers between 0 and 1.

//Install
//npm install -s excel-date-to-js
//Usage
const { getJsDateFromExcel } = require("excel-date-to-js");
getJsDateFromExcel("42510");
// 2016-05-20T00:00:00.000Z