Get value of day month from Date object in Android?

import android.text.format.DateFormat;

String dayOfTheWeek = (String) DateFormat.format("EEEE", date); // Thursday
String day          = (String) DateFormat.format("dd",   date); // 20
String monthString  = (String) DateFormat.format("MMM",  date); // Jun
String monthNumber  = (String) DateFormat.format("MM",   date); // 06
String year         = (String) DateFormat.format("yyyy", date); // 2013

You can try:

String input_date="01/08/2012";
SimpleDateFormat format1=new SimpleDateFormat("dd/MM/yyyy");
Date dt1=format1.parse(input_date);
DateFormat format2=new SimpleDateFormat("EEEE"); 
String finalDay=format2.format(dt1);

Also try this:

Calendar c = Calendar.getInstance();
c.setTime(yourDate);
int dayOfWeek = c.get(Calendar.DAY_OF_WEEK);

to custom days of week you can use this function

public static String getDayFromDateString(String stringDate,String dateTimeFormat)
{
    String[] daysArray = new String[] {"saturday","sunday","monday","tuesday","wednesday","thursday","friday"};
    String day = "";

    int dayOfWeek =0;
    //dateTimeFormat = yyyy-MM-dd HH:mm:ss
    SimpleDateFormat formatter = new SimpleDateFormat(dateTimeFormat);
    Date date;
    try {
        date = formatter.parse(stringDate);
        Calendar c = Calendar.getInstance();
        c.setTime(date);
        dayOfWeek = c.get(Calendar.DAY_OF_WEEK)-1;
        if (dayOfWeek < 0) {
            dayOfWeek += 7;
        }
        day = daysArray[dayOfWeek];
    } catch (Exception e) {
        e.printStackTrace();
    }

    return day;
}

dateTimeFormat for example dateTimeFormat = "yyyy-MM-dd HH:mm:ss";