Convert a date to numeric format google app script

April 21, 2022

I want to convert a date like this dd/mm/yyyy to numeric format but I don’t find any way to do this in google app script
For example I have a date in my "L2" cell so I get the value like this :

date = active_sheet.getRange("L2").getValue()

How to convert date variable to numeric format (integer) ? For example today’s date in numeric format is something like 44 000

Thanks in advance

>Solution :

I believe your goal is as follows.

You want to convert the date object or the date string to the serial number using Google Apps Script.

From I think it's a date object but i'm not sure... , I thought that 2 patterns can be considered.

Pattern 1:

In this pattern, it supposes that the value of date = active_sheet.getRange("L2").getValue() is the date object. The sample script is as follows.

var active_sheet = SpreadsheetApp.getActiveSheet();
var date = active_sheet.getRange("L2").getValue();
var serialNumber = (date.getTime() / 1000 / 86400) + 25569; // Reference: https://stackoverflow.com/a/6154953
console.log(serialNumber);

Pattern 2:

In this pattern, it supposes that the value of date = active_sheet.getRange("L2").getValue() is the string value like dd/mm/yyyy. The sample script is as follows.

var active_sheet = SpreadsheetApp.getActiveSheet();
var date = active_sheet.getRange("L2").getValue(); // or getDisplayValue()
var [d, m, y] = date.split("/");
var d = new Date(y, m, d);
var serialNumber = (d.getTime() / 1000 / 86400) + 25569; // Reference: https://stackoverflow.com/a/6154953
console.log(serialNumber);