What Day solution

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class WhatDay
{
    public static void printDay() throws NumberFormatException, IOException
    {
        BufferedReader reader = new BufferedReader(new InputStreamReader(
                System.in));
        System.out.println("Enter the day, (1...31) -->");
        int currentDay = Integer.parseInt(reader.readLine());
        System.out.println("Enter the month, (1...12) -->");
        int currentMonth = Integer.parseInt(reader.readLine());
        System.out.println("Enter the year -->");
        int currentYear = Integer.parseInt(reader.readLine());

        // is input year a leap year?
        int leapValue = 0;
        if (isLeapYear(currentYear) == 1
                && (currentMonth == 1 || currentMonth == 2))
        {
            leapValue = 1;
        }
        else
        {
            leapValue = 0;
        }
        int amtDaysCalc = (currentYear - 1900) + ((currentYear - 1900) / 4)
                - leapValue + amtDaysUpToCurrentDate(currentDay, currentMonth);
        int dayNumVar = amtDaysCalc % 7;
        String day = findDayFromNum(dayNumVar);
        System.out.println("Day is " + day);

    }

    public static int isLeapYear(int year)
    {
        int leap;
        if (year % 400 == 0 || year % 100 == 0 || year % 4 == 0)
        {
            leap = 1;
        }
        else
        {
            leap = 0;
        }
        return leap;
    }

    public static int amtDaysUpToCurrentDate(int day, int month)
    {
        int result = 0, tally = 0;
        final int amtDaysJan = 31, amtDaysFeb = 28, amtDaysMar = 31, amtDaysApr = 30, amtDaysMay = 31, amtDaysJun = 30, amtDaysJul = 31, amtDaysAug = 31, amtDaysSep = 30, amtDaysOct = 31, amtDaysNov = 30, amtDaysDec = 31;
        int[] days = { amtDaysJan, amtDaysFeb, amtDaysMar, amtDaysApr,
                amtDaysMay, amtDaysJun, amtDaysJul, amtDaysAug, amtDaysSep,
                amtDaysOct, amtDaysNov, amtDaysDec };

        if (month == 1)
        {
            result = day;
            return result;
        }
        else if (month > 1 && month <= 12)
        {
            for (int i = 0; i < month - 1; i++)
            {
                tally += days[i];
            }
        }
        else
        {
            System.err.println("Error, invalid month.");
        }
        return result = tally + day;
    }

    public static String findDayFromNum(int num)
    {
        if (num < 0 || num > 6)
        {
            num = 7;
        }
        String[] days = { "Sunday", "Monday", "Tuesday", "Wednesday",
                "Thursday", "Friday", "Saturday", "Error" };
        return days[num];
    }

    public static void main(String[] args) throws NumberFormatException,
            IOException
    {
        printDay();
    }
}