February 2016 has 29 days but I get 28

[RiccardoFabozzi]

The issue is in the title (http://www.timeanddate.com/calendar/custom.html?year=2016&country=1&hol=25&df=1). I'm getting the same error for February 2020 and 2024.
Below my code:

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.MenuItem;
import android.widget.TextView;

import com.andexert.calendarlistview.library.DayPickerView;
import com.andexert.calendarlistview.library.SimpleMonthAdapter;

public class Calendar extends AppCompatActivity implements com.andexert.calendarlistview.library.DatePickerController{

    @Override
    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.calendar);

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar_layout);

        TextView mTitle = (TextView) toolbar.findViewById(R.id.toolbar_title);
        mTitle.setText("Calendar");
        setSupportActionBar(toolbar);

        assert getSupportActionBar() != null;

        this.getSupportActionBar().setDisplayHomeAsUpEnabled(true); 
        this.getSupportActionBar().setDisplayShowTitleEnabled(false);

        DayPickerView dayPickerView = (DayPickerView)findViewById(R.id.pickerView);
        dayPickerView.setController(this);

    }

    @Override
    public int getMaxYear()
    {
        return 2026;
    }

    @Override
    public void onDayOfMonthSelected(int year, int month, int day)
    {
        Log.e("Day Selected", day + " / " + month + " / " + year);
    }

    @Override
    public void onDateRangeSelected(SimpleMonthAdapter.SelectedDays<SimpleMonthAdapter.CalendarDay> selectedDays)
    {

        Log.e("Date range selected", selectedDays.getFirst().toString() + " --> " + selectedDays.getLast().toString());
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                finish();
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }

}