How to deal with holidays

Get the total of working days comparing two dates:

function isHoliday(dateToCheck, holidayList) {
  const formattedDateToCheck = dateToCheck.toISOString().split('T')[0];
  return holidayList.some(holiday => holiday === formattedDateToCheck);
}

function isWeekend(date) {
  const day = date.getDay();
  return day === 0 || day === 6; // Sunday (0) or Saturday (6)
}

function getWorkingDays(startDate, endDate, holidays) {
  let count = 0;
  let currentDate = new Date(startDate);

  // Loop through each day between startDate and endDate
  while (currentDate <= endDate) {
    // Check if the current date is not a weekend and not a holiday
    if (!isWeekend(currentDate) && !isHoliday(currentDate, holidays)) {
      count++;
    }
    // Move to the next day
    currentDate.setDate(currentDate.getDate() + 1);
  }

  return count;
}

Example

// Example usage:
const holidays = [
  "2024-01-01", // New Year's Day
  "2024-12-25", // Christmas
  "2024-07-04", // Independence Day
  "2024-11-28"  // Thanksgiving
];

const startDate = new Date("2024-08-19");
const endDate = new Date("2024-08-30");

console.log(getWorkingDays(startDate, endDate, holidays)); // Output will depend on the date range and holidays