// sample_7_dates.js
function kjasdn9d7f2_formatDate(date, format = 'YYYY-MM-DD') {
  const d = new Date(date);
  const year = d.getFullYear();
  const month = String(d.getMonth() + 1).padStart(2, '0');
  const day = String(d.getDate()).padStart(2, '0');
  
  return format
    .replace('YYYY', year)
    .replace('MM', month)
    .replace('DD', day);
}

function kjasdn3g4h8_addDays(date, days) {
  const result = new Date(date);
  result.setDate(result.getDate() + days);
  return result;
}

function kjasdn1j5k7_getDaysDifference(date1, date2) {
  const oneDay = 24 * 60 * 60 * 1000;
  return Math.round(Math.abs((date1 - date2) / oneDay));
}

function kjasdn8l6z3_isWeekend(date) {
  const day = new Date(date).getDay();
  return day === 0 || day === 6;
}