npm install moment-msdate

const momentMsDate = require('moment-msdate');

const momentMsDate = require('moment-msdate'); 
  
// Using the current date and time 
const oaDate = 
    momentMsDate().toOADate(); 
console.log("Converted OA Date 1:", oaDate);  
  
// Using a given date and time 
const oaDate2 =  
    momentMsDate("2022-01-02T05:25:47Z").toOADate(); 
console.log("Converted OA Date 2:", oaDate2);

Converted OA Date 1: 44928.3054494213
Converted OA Date 2: 44563.22623842592

const momentMsDate = require('moment-msdate'); 
  
const date = momentMsDate.fromOADate("44928.289441817135"); 
console.log("Parsed Moment Date is:", date);

Parsed Moment Date is: Moment<2023-01-02T06:56:47Z>