How to find working days between any 2 dates

function workdaysBetweenDates(date1Str, date2Str) {
    const date1 = new Date(date1Str);
    const date2 = new Date(date2Str);

    let workdays = 0;
 
    // Iterate through each day and count workdays
    while (date2 >= date1) {
        const dayOfWeek = date1.getUTCDay();
     
        if (dayOfWeek !== 0 && dayOfWeek !== 6) { // 0 is Sunday, 6 is Saturday
            workdays++;
        }
     
        // Move to the next day
        date1.setUTCDate(date1.getUTCDate() + 1);
    }
 
    return workdays;
}

// Sample dates
const startDate = '2023-09-01';
const endDate = '2023-09-30';

const workdaysDifference = workdaysBetweenDates(startDate, endDate);
return(`The number of workdays between ${startDate} and ${endDate} is ${workdaysDifference}.`);

// Sample dates
const startDate = '2023-09-01';
const endDate = '2023-09-30';