I want to calculate Saturday's and Sunday's in a date range

Question

I want to calculate Saturday's and Sunday's in a date range? How can i ?

Answer 1

iterate in days and so :

Calendar date ;//initiate with your date
int day = date.get(Calendar.DAY_OF_WEEK); // 1=Sunday , 2=Monday , ...

check the day:

if(day == 1 || day == 7)
{
    //add to your list this **date** (for example List<Calender>
}

and so on.

Answer 2

Joda example:

dateTime.dayOfWeek().get() == DateTimeConstants.SATURDAY;

Answer 3

Find 1st Saturday&Sunday in the range, then Calendar.add(Calendar.DATE, 7) to get Saturdays&Sundays until end of range. It's faster than checking each day in the range.

Answer 4

// Initialise two dates at midnight
Calendar startDate = Calendar.getInstance();
startDate.set(startYear, startMonth - 1, startDay, 0, 0, 0);
Calendar endDate = Calendar.getInstance();
endDate.set(endYear, endMonth - 1, endDay, 0, 0, 0);

// Calculate number of full weeks between two dates
long startDateMillis = startDate.getTimeInMillis();
long endDateMillis = endDate.getTimeInMillis();
long weeksInRange = (endDateMillis - startDateMillis) / 1000 / 60 / 60 / 24 / 7;
// Multiply by 2 to get weekend days in range
long weekendDaysInRange = weeksInRange * 2;

// Add on extra days in final incomplete week
int startDayOfWeek = startDate.get(Calendar.DAY_OF_WEEK);
int endDayOfWeek = endDate.get(Calendar.DAY_OF_WEEK);
if (endDayOfWeek == Calendar.SATURDAY) {
    if (startDayOfWeek != Calendar.SATURDAY) {
        weekendDaysInRange++;
    }
} else {
    if (startDayOfWeek == Calendar.SATURDAY) {
        weekendDaysInRange++;
    } else if (startDayOfWeek != Calendar.SUNDAY) {
        weekendDaysInRange += 2;
    }
}