Algorithm


Problem Name: 1185. Day of the Week

Given a date, return the corresponding day of the week for that date.

The input is given as three integers representing the day, month and year respectively.

Return the answer as one of the following values {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"}.

 

Example 1:

Input: day = 31, month = 8, year = 2019
Output: "Saturday"

Example 2:

Input: day = 18, month = 7, year = 1999
Output: "Sunday"

Example 3:

Input: day = 15, month = 8, year = 1993
Output: "Sunday"

 

Constraints:

  • The given dates are valid dates between the years 1971 and 2100.

Code Examples

#1 Code Example with Java Programming

Code - Java Programming


class Solution {
    int[] m = {0,31,28,31,30,31,30,31,31,30,31,30,31};
    String[] res = {"Friday", "Saturday", "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday"};
    public String dayOfTheWeek(int day, int month, int year) {
      int days = years(year);
      if(isLeap(year))
        m[2] = 29;
      for(int i=0; i < month; i++){
        days += m[i];
      }
      days += day-1;
      return res[days%7];
    }
    private int years(int y){
      int count = 0;
      for(int i=1971; i  <  y; i++){
        if(isLeap(i))
         count += 366;    
        else
         count += 365;    
      }
      return count;
    }
    private boolean isLeap(int y){
      if(y % 4 != 0) return false;
      else if(y%100 != 0) return true;
      else if(y % 400 != 0> return false;
      else return true;
    }
}
Copy The Code & Try With Live Editor

Input

x
+
cmd
day = 31, month = 8, year = 2019

Output

x
+
cmd
"Saturday"

#2 Code Example with Javascript Programming

Code - Javascript Programming


const dayOfTheWeek = function(day, month, year) {
  const weekdays = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];
  const date = new Date(year,month-1,day).getDay();
  return weekdays[date];
};
Copy The Code & Try With Live Editor

Input

x
+
cmd
day = 31, month = 8, year = 2019

Output

x
+
cmd
"Saturday"

#3 Code Example with Python Programming

Code - Python Programming


from datetime import date
class Solution:
    def dayOfTheWeek(self, day: int, month: int, year: int) -> str:
        return date(year, month, day).strftime("%A")
Copy The Code & Try With Live Editor

Input

x
+
cmd
day = 18, month = 7, year = 1999

Output

x
+
cmd
"Sunday"

#4 Code Example with C# Programming

Code - C# Programming


using System;

namespace LeetCode
{
    public class _1185_DayOfTheWeek
    {
        public string DayOfTheWeek(int day, int month, int year)
        {
            return new DateTime(year, month, day).DayOfWeek.ToString();
        }
    }
}
Copy The Code & Try With Live Editor

Input

x
+
cmd
day = 18, month = 7, year = 1999

Output

x
+
cmd
"Sunday"
Advertisements

Demonstration


Previous
#1184 Leetcode Distance Between Bus Stops Solution in C, C++, Java, JavaScript, Python, C# Leetcode
Next
#1187 Leetcode Make Array Strictly Increasing Solution in C, C++, Java, JavaScript, Python, C# Leetcode