Java Date and Time

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    Easy in Java by Using LocalDateTime class

    public static String findDay(int month, int day, int year) {

        LocalDateTime localDateTime = LocalDateTime.of(year, month, day,0,0,0);
    
      DayOfWeek dayOfWeek= localDateTime.getDayOfWeek();
    
      return dayOfWeek.toString();
    }
    
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    Some weird class to be honest.

    public static String findDay(int month, int day, int year) {
        final String[] days = {"SUNDAY", "MONDAY", "TUESDAY", "WEDNESDAY", "THURSDAY", "FRIDAY", "SATURDAY"};
        Calendar cal = Calendar.getInstance();
        cal.set(year, month - 1, day);
        return days[cal.get(Calendar.DAY_OF_WEEK)-1];
    }
    
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    public static String findDay(int month, int day, int year) {
        String [] daysOfWeek = {"SATURDAY", "SUNDAY", "MONDAY", "TUESDAY", "WEDNESDAY",  "THURSDAY", "FRIDAY"};
        if (month < 3) {
            month += 12;
            year -= 1;
        }
        // h = (q + (13(m + 1)/5) + K + (K / 4) + (J / 4) + 5J) mod 7
        int dayOfWeek = (day + (13 * (month + 1) / 5) + year % 100 
            + (year % 100 / 4) + (year / 100 / 4) + 5 * (year / 100)) % 7;
        return daysOfWeek[dayOfWeek];
    }
    
  • + 1 comment
     public static String findDay(int month, int day, int year) {
            return LocalDate.of(year, month, day).getDayOfWeek().toString();
        }
    
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      Why is this answer get downvoted? SMH