var date = new Date();

function takeYear(theDate)
{
x = theDate.getYear();
var y = x % 100;
y += (y < 38) ? 2000 : 1900;
return y;
}

function leadingZero(nr)
{

if (nr < 10) nr = "0" + nr;
return nr;
}

function display_date() {
   var day_of_week_number = date.getDay();
   var day_of_month = leadingZero(date.getDate());
   var month_number = leadingZero(1+date.getMonth());
   var year = takeYear(date);
   var day_of_week = '';
   if(day_of_week_number == 0){day_of_week = 'неділя';}
   if(day_of_week_number == 1){day_of_week = 'понеділок';}
   if(day_of_week_number == 2){day_of_week = 'вівторок';}
   if(day_of_week_number == 3){day_of_week = 'середа';}
   if(day_of_week_number == 4){day_of_week = 'четвер';}
   if(day_of_week_number == 5){day_of_week = 'п&#039;ятниця';}
   if(day_of_week_number == 6){day_of_week = 'субота';}
   var date_to_show = day_of_month + '.' + month_number +  '.' + year +', ' + day_of_week;
   return (date_to_show);
}

function sayHello () {
var hours = date.getHours(); 
 if ((hours >= 6) && (hours < 10)) { return('Добрий ранок')}
 if ((hours >= 10) && (hours < 18)) { return('Добрий день')}
 if ((hours >= 18) && (hours < 22)) { return('Добрий вечір')}
 else { return('Доброї ночі')}
}